Blog

Keeping your vehicle’s transmission in optimal condition isn’t just about a smooth ride; it’s also about avoiding costly repairs and unexpected breakdowns. At Circle D Transmission, we know firsthand how proper maintenance can extend the lifespan of your transmission and ensure reliable performance for years to come. Here, we’ll share our top maintenance tips to help you steer clear of unnecessary transmission repair.

Monitor and Maintain Transmission Fluid Levels

Transmission fluid is the lifeblood of your transmission, preventing overheating, reducing friction, and ensuring smooth shifting. Without it, your transmission is exposed to severe wear and tear. To keep things running smoothly, regularly check your transmission fluid levels as part of your vehicle’s routine maintenance.

Be sure the fluid is at the correct level and appears clean. Healthy transmission fluid should be a bright red color; if it looks dark or has a burnt smell, it’s time for a change. Always use the fluid type recommended by your vehicle’s manufacturer to avoid compatibility issues. If you're unsure about when or how to check your transmission fluid, a quick visit to our team at Circle D Transmission can make all the difference.

Get Your Transmission Serviced Regularly

Routine servicing is crucial for catching transmission issues early before they escalate into expensive repairs. This typically includes inspecting the system, replacing the transmission fluid, and flushing out any debris or contaminants that could cause damage to internal components.

At Circle D Transmission, we recommend following your vehicle manufacturer’s suggested service intervals. Whether it’s a full transmission flush or a simple fluid top-up, regular servicing ensures that your transmission performs optimally under various driving conditions. Neglecting these maintenance measures could lead to needing costly repairs, which no driver looks forward to.

Pay Attention to Warning Signs

Your transmission usually gives you warning signs when something is wrong. Paying close attention to these indicators can save you from severe damage. Common signs to watch for include:

• Delayed gear shifts
• Unusual noises such as grinding, whining, or clunking
• Burning smells coming from the engine
• Fluid leaks underneath your vehicle
• Warning lights on your dashboard

If you notice any of these signs, don’t wait. Address the issue immediately by seeking the help of a trusted professional, like the experts at Circle D Transmission. Catching these problems early can prevent more extensive damage and hefty repair bills.

Drive Smart and Avoid Overworking Your Transmission

Your driving habits can have a profound impact on the health of your transmission. Extreme driving practices like quick starts, sudden stops, or constantly shifting gears can put unnecessary strain on your transmission. Additionally, avoid towing loads that exceed your vehicle’s recommended capacity, as this can cause overheating and wear out the transmission prematurely.

Consider allowing your vehicle to come to a complete stop before shifting between reverse and drive, and avoid excessive idling when possible. By driving smart, you can help prolong your transmission’s life and maintain your vehicle’s overall performance.

Regular Maintenance Saves Money and Stress

Keeping your transmission in great shape isn’t just about avoiding breakdowns; it’s also a commitment to saving money, reducing stress, and maintaining the value of your vehicle. Regular maintenance, paired with mindful driving habits, ensures your car runs efficiently and reduces the likelihood of unforeseen repair costs.

If your transmission requires professional attention, you can always count on the experienced team at Circle D Transmission. We’ve been serving drivers just like you for decades, offering expert transmission repair and honest advice.

Frequently Asked Questions About Transmission Repair

How often should I replace my transmission fluid?

The replacement frequency depends on your vehicle’s make, model, and recommendations from the manufacturer. Typically, you should replace the fluid every 30,000 to 60,000 miles, but this may vary if you frequently drive in extreme conditions or tow heavy loads. Be sure to consult your owner’s manual or a trusted technician for tailored guidelines.

What happens if I ignore early signs of transmission trouble?

Ignoring early warning signs like delayed shifting, strange noises, or transmission fluid leaks can lead to significant damage. The longer these problems go unaddressed, the more costly and extensive the repair becomes. Prompt action can save you both time and money while ensuring your transmission remains functional.

At Circle D Transmission, we take pride in keeping your vehicle’s transmission in peak condition. Visit us for routine maintenance or if you suspect an issue. For more details, contact us today—we’re here to help!

When it comes to high-performance vehicles, your 8L90 transmission plays a crucial role in delivering power and precision. While this transmission is renowned for its innovative design and capability, there’s always room to enhance its performance. Whether you're looking for faster, smoother shifts or improved durability under pressure, the right upgrades can take your driving experience to the next level.

At Circle D Transmission, we understand the intricacies of the 8L90 transmission better than anyone. That’s why we’ve curated this guide to highlight the top upgrades that can help you get the most out of your transmission. Read on for expert recommendations that will improve shift speed and power while ensuring your transmission is reliable for every mile you drive.

Upgrade 1: Performance Torque Converter

A performance torque converter is one of the most effective upgrades you can make for your 8L90 transmission. This component optimizes the delivery of power from the engine to the transmission, enabling quicker acceleration and smoother transitions between gears. It’s especially beneficial for vehicles used in racing or heavy-duty applications where efficiency and speed are paramount.

When selecting a torque converter, look for one that improves stall speed and lock-up characteristics without compromising durability. Circle D Transmission offers expertly designed performance torque converters to ensure your 8L90 reaches its peak potential.

Upgrade 2: Custom Tuning for Shift Enhancements

Tuning your 8L90 transmission can dramatically enhance its responsiveness and overall performance. Custom tuning adjusts the transmission’s shift points, torque converter lock-up, and pressure calibrations to help your system operate more efficiently. This results in quicker, firmer shifts that deliver power exactly when you need it.

We recommend consulting a professional tuner experienced with 8L90 transmissions to get the most out of this upgrade. Proper tuning ensures your transmission performs optimally without causing unnecessary wear or damage.

Upgrade 3: Valve Body Upgrades

The valve body is the heart of your transmission’s hydraulic control system. Upgrading to a high-performance valve body improves fluid flow and pressure management, allowing your transmission to perform faster, crisper shifts. This is an excellent modification for anyone seeking improved shift speeds alongside better overall operational consistency.

At Circle D Transmission, we provide premium valve body kits engineered to boost the efficiency and reliability of your 8L90. This upgrade is particularly useful for demanding driving conditions or vehicles with increased horsepower and torque.

Upgrade 4: Clutch Packs and Friction Materials

The 8L90 transmission’s clutch packs are critical for transferring power between gears. Swapping your factory clutch packs with high-performance ones can handle higher torque loads while reducing heat and wear. Similarly, investing in superior friction materials can further enhance durability and performance under demanding conditions.

With upgraded clutch packs and friction materials, drivers experience smoother gear shifts and increased responsiveness, even in extreme applications. This is a must-have for anyone serious about maximizing their transmission’s lifespan and performance.

Upgrade 5: 8L90 Transmission Upgrades Kit

Lastly, consider investing in a comprehensive 8L90 transmission upgrades kit. These kits typically include several components designed to optimize your vehicle’s performance in one cohesive package. A quality upgrades kit can streamline the process of enhancing your transmission by providing all the essential components in one solution.

At Circle D Transmission, our 8L90 upgrades kit combines reliability and innovation, delivering everything you need to transform your driving experience. From upgraded clutches and valve bodies to custom tuning guidance, our kits ensure your 8L90 transmission is ready to handle anything you throw at it.

The Ultimate Driving Experience Awaits

Investing in the right upgrades for your 8L90 transmission can make all the difference in achieving peak performance. From faster gear changes to enhanced durability, these modifications empower your vehicle to meet and exceed your expectations. At Circle D Transmission, we are passionate about helping drivers unlock their transmission’s full potential with our advanced products and trusted expertise.

If you’re ready to elevate your 8L90’s performance, explore our selection of 8L90 performance parts or consult our team for personalized guidance. Together, we can create the ultimate driving experience.

Frequently Asked Questions About 8L90 Transmission Upgrades

What are the benefits of upgrading my 8L90 transmission?

Upgrading your 8L90 transmission enhances its shift speed, power delivery, and overall durability. These upgrades help optimize your vehicle’s performance for racing, towing, or daily driving. You can experience smoother gear shifts, better torque management, and a longer lifespan for your transmission components.

Can I install 8L90 upgrades myself?

While some upgrades, like replacing the torque converter or valve body, may be manageable for experienced enthusiasts, we recommend professional installation. Components like custom tuning and friction material upgrades require precision and expertise to ensure proper function. Circle D Transmission provides expert installation and consultation services to help you achieve the best results.

At Circle D Transmission, we are proud to be a trusted partner for drivers looking to enhance their transmission performance. From high-quality 8L90 upgrades to expert guidance, we’re here to help you exceed your goals. Contact us to learn more or schedule a consultation today.

Finding a trustworthy transmission repair shop can feel overwhelming, especially when you’re unsure what to look for or which questions to ask. Your transmission is one of the most critical components of your vehicle, responsible for transferring power from the engine to the wheels and ensuring smooth operation. Choosing the wrong repair shop can result in higher costs, extended downtimes, and substandard repairs that could lead to further issues down the road.

Thankfully, there are clear indicators that can help you make an informed decision about where to take your car. Below, we’ll guide you through the key factors to consider when choosing a reliable and professional transmission repair service. By paying attention to these elements, you can ensure that your vehicle receives the best care possible and avoid unnecessary stress or financial strain.

Look for Certified Expertise

One of the first things to check when choosing a repair shop is whether their technicians are certified. Certifications such as ASE (Automotive Service Excellence) demonstrate that the shop employs highly qualified professionals who have undergone extensive training and testing to meet industry standards. Certification is a clear indicator of the shop’s technical expertise and commitment to maintaining high-quality service.

In addition to certifications, it’s essential to ask the shop about their experience working specifically on transmissions. Not all automotive repair shops are equally skilled in all areas of vehicle repair. Expertise in engine repairs, for example, doesn’t necessarily translate to knowledge about the complexities of transmissions, which require specialized tools and techniques. For instance, at Circle D Transmission, their certified professionals have decades of experience in transmission diagnostics and repair, allowing them to deliver consistently high-quality results tailored to the unique needs of each vehicle.

Seek Transparency and Honest Communication

A trustworthy repair shop prioritizes clear, upfront communication with customers. This includes providing a detailed diagnosis of the issue, a comprehensive breakdown of repair costs, and an explanation of your options before any work begins. They should be willing to answer your questions and address any concerns you may have without pressuring you into unnecessary repairs or surprising you with hidden fees once the job is done.

When choosing a repair shop, ask about their repair process and request an estimate on pricing and timelines for the work. Reliable shops are always happy to walk you through the process and ensure you understand what to expect. Whenever possible, rely on customer reviews online or recommendations from friends and family to verify the shop’s reputation for transparency and honesty. A shop consistently praised for clear communication is far more likely to be dependable and trustworthy, providing peace of mind throughout the repair process.

Pay Attention to Warranties and Guarantees

A quality transmission repair service stands behind its work by offering warranties or guarantees on repairs. This demonstrates the shop’s confidence in its ability to provide long-lasting, effective solutions and serves as a safety net for you as the customer. Warranties ensure that if unexpected issues arise following the repair, they will be addressed at no additional cost within the warranty period.

At Circle D Transmission, for example, customers benefit from warranties on remanufactured transmissions and other repair services, providing added peace of mind with every visit. These warranties are a testament to their commitment to delivering reliable repairs that meet the highest standards. When evaluating repair shops, carefully review the details of any warranties offered and ensure they align with your expectations. A shop that prioritizes customer satisfaction through strong warranty policies is more likely to deliver quality results.

Evaluate Their Customer Experience

Your experience with a transmission repair shop should be positive from start to finish. From the moment you make your first call for an estimate to the time you pick up your car post-repair, the shop should make you feel valued, respected, and well-informed. Look for shops that go the extra mile to offer convenient services, such as towing or shuttle options, as well as frequent updates on the progress of your repair.

Reading customer testimonials and reviews is an excellent way to gauge the shop’s customer service quality. Positive feedback from past customers can provide valuable insights into the shop’s ability to meet and exceed expectations. For example, Circle D Transmission has become a trusted name in the Houston area, thanks to their dedication to excellent communication, transparency, and a customer-centered approach. Their glowing testimonials highlight their ability to consistently deliver exceptional service while fostering long-term trust and loyalty among their clients.

Final Thoughts

Finding the right transmission repair shop doesn’t have to be a daunting task. By focusing on key factors such as certified expertise, transparent communication, strong warranties, and excellent customer service, you can make an informed decision that ensures your vehicle is in good hands. Shops like Circle D Transmission exemplify these qualities, offering professional, reliable service that keeps your car running smoothly and your mind at ease. Take the time to research and choose a repair shop that aligns with your needs, and you’ll save yourself time, money, and stress in the long run.

Frequently Asked Questions About Transmission Repair

How do I know if my car’s transmission needs repair?

There are several signs your transmission may need attention, including slipping gears, delayed shifting, leaking fluid, a burning smell, or unusual noises such as grinding or whining. If you notice these symptoms, it’s important to act quickly and bring your car to a trusted transmission repair shop for a professional diagnosis.

Why is finding a specialized transmission repair shop important?

Transmission systems are complex, involving a mix of mechanical, hydraulic, and electrical components. Choosing a specialized shop ensures you work with experts trained to diagnose and repair transmission issues accurately. General repair shops may lack the specific tools, experience, or certifications necessary for high-quality transmission work.

At Circle D Transmission, we understand that choosing the right repair shop is essential for your vehicle’s performance and your peace of mind. Since 1976, we’ve been proud to provide trusted, professional transmission repair services to customers across the greater Houston area. Visit our website to contact us today to schedule an appointment or ask us a question.

The 6L80 transmission is a highly versatile and reliable six-speed automatic transmission commonly found in vehicles from the GM family, such as Chevrolet, GMC, and Cadillac models. Known for its durability and efficiency, this transmission has become a staple for both everyday drivers and automotive enthusiasts. While the 6L80 performs exceptionally well in its stock form, there’s always room for improvement, especially for those looking to push their vehicles to new performance heights. Whether you’re building a high-horsepower car for the track, modifying your truck for heavy towing, or simply aiming for a smoother and more responsive daily driver, upgrading the 6L80 transmission ensures your vehicle operates at peak performance under any condition. 

This guide dives into the world of 6L80 enhancements, covering upgrades that boost its durability, improve shifting performance, and maximize overall efficiency. If you’re ready to elevate your driving experience, read on to discover the best ways to unleash the full potential of your 6L80 transmission. 

Upgrading Parts for Durability 

One of the most important steps in enhancing the 6L80 transmission is upgrading its internal components for added durability. Although the 6L80 is built tough enough to handle daily driving and moderate towing, high-performance applications like racing or heavy-duty towing can push this transmission to its limits. Stock components, while reliable, may wear out prematurely or fail under extreme stress. Reinforcing critical parts is essential to ensure your transmission can handle increased horsepower and torque without compromising performance. 

High-performance rebuild kits, such as Circle D Transmission’s 6L80 Level 3 Performance Kit, are designed specifically to upgrade the durability of these transmissions. These kits include upgraded clutches, bands, and other internal components made from higher-strength materials that are engineered to handle the added stress of demanding applications. By replacing the factory parts with these robust alternatives, you can extend the lifespan of your transmission and prepare it for whatever challenges you throw its way. Whether you’re upgrading for heavy towing, drag racing, or off-road adventures, starting with a strong foundation is key. 

For those seeking even more performance, upgrading the torque converter is a must. A performance-grade torque converter not only improves torque multiplication but also enhances power delivery from the engine to the transmission. This upgrade is particularly beneficial for improved acceleration, smoother power transitions, and increased load-carrying capacity. Enthusiasts looking to maximize their performance will find that a high-quality torque converter is one of the most impactful upgrades for the 6L80. 

Additionally, upgrading the input shaft and planetary gear sets can further reinforce the transmission, especially for vehicles generating extreme horsepower. These components often bear the brunt of engine power, so stronger materials and designs can ensure better reliability during high-stress conditions. 

Improving Shift Performance 

Shift performance is another critical area for enhancing the 6L80 transmission. Factory settings typically prioritize comfort over speed, resulting in slower and softer shifts. While this is ideal for casual drivers, enthusiasts and performance-oriented vehicle owners may find it lacking in responsiveness and engagement. Improving shift performance not only makes driving more enjoyable but also enhances the overall efficiency and reliability of the transmission. 

One of the most effective ways to improve shift quality is through custom tuning of the transmission control module (TCM). Custom tuning allows you to recalibrate shift points, line pressure, and torque converter lock-up points to match your specific driving style or vehicle setup. These adjustments can result in faster, firmer shifts that improve acceleration and responsiveness. Many vehicle owners also notice improved fuel efficiency after optimizing shift points for their unique driving conditions. TCM tuning is a cost-effective and impactful way to unlock the true potential of the 6L80 transmission. 

Installing a high-performance valve body is another essential shift-related upgrade. The valve body is responsible for directing hydraulic fluid through the transmission, controlling gear changes. Upgraded valve bodies ensure faster fluid flow and firmer shifts, reducing the risk of clutch slippage and improving overall reliability. Combined with TCM tuning, a high-performance valve body can transform the driving experience, giving you smoother and more precise shifts no matter the conditions. 

For those looking to go even further, solenoid upgrades can be added to enhance the transmission's responsiveness. High-performance solenoids improve fluid control, ensuring lightning-fast gear changes that can handle high RPMs and heavy loads. 

Why Enhance Your 6L80 Transmission? 

Upgrading your 6L80 transmission is more than just a performance boost—it’s an investment in the long-term reliability and capability of your vehicle. High-powered applications like towing, racing, or off-roading put immense pressure on the transmission, and stock components may not always be up to the task. Upgrading ensures your vehicle remains dependable under demanding conditions, giving you peace of mind whether you’re on the track or the highway. 

Durability upgrades help prevent premature wear and costly repairs, while shift enhancements improve the responsiveness and efficiency of your vehicle. Each upgrade, from performance rebuild kits to TCM tuning, brings you closer to unlocking the full potential of your 6L80 transmission. With options like Circle D Transmission’s Level 3 Performance Kit, upgrading your transmission becomes a manageable and rewarding process. 

Whether your goal is to build a track-ready powerhouse, a heavy-duty workhorse, or a refined daily driver, enhancing your 6L80 ensures you’re prepared for every challenge on the road. Don’t settle for factory limitations—start upgrading your 6L80 today and experience the difference in performance, reliability, and driving satisfaction!

Frequently Asked Questions About 6L80 Performance Transmission Rebuild 

What are some common signs my 6L80 transmission needs a performance rebuild? 

Signs that your 6L80 transmission may need a performance rebuild include delayed shifting, transmission slipping, overheating under load, or unusual noises during operation. These symptoms often indicate internal wear or damage, especially if the transmission is being pushed beyond its capacity. Rebuilding your 6L80 with a performance kit can address these issues and equip the transmission for more demanding applications. 

How do I choose the right performance parts for my 6L80 transmission? 

The right performance parts depend on your intended use for the vehicle. For everyday driving with occasional towing or hauling, high-quality clutch packs and a torque converter may suffice. If you’re building a high-performance or racing vehicle, consider a complete performance rebuild kit, upgraded valve bodies, and custom TCM tuning. Working with a specialist like Circle D Transmission ensures you’ll receive recommendations tailored to your vehicle and performance goals. 

Since 1976, Circle D Transmission has been building trust in the greater Houston area by delivering reliable, expert-level transmission services. From repairs to performance rebuilds, we focus on helping automotive enthusiasts and professionals get the most out of their vehicles. Contact us today and discover how we can elevate your vehicle’s performance.

The 8L90 transmission is well-regarded for its efficiency and versatility, powering many General Motors vehicles. However, like any high-performance transmission, it’s susceptible to wear and tear, especially under demanding conditions. Problems such as shuddering, overheating, slow shifts, and frequent failure of certain components can occur when this transmission is pushed to its limits.

For auto enthusiasts and car owners, these issues can be frustrating, impacting vehicle performance and reliability. The good news? Upgrades to the 8L90 transmission can address these challenges, improving durability, performance, and overall driving experience. Below, we’ll explore some of the most common problems with the 8L90 transmission and how targeted upgrades can provide solutions.

Torque Converter Shudder

One of the most frequently reported issues with the 8L90 transmission is the torque converter shudder. This problem typically presents as a vibration or shaking sensation, particularly when driving at steady speeds while applying light throttle, such as during highway cruising. The culprit is often excessive wear or contamination of the torque converter clutch.

How Upgrades Can Help: 

Upgrading the torque converter to a high-performance model is one of the best ways to address this issue. Performance torque converters are designed with improved materials and precision engineering that minimize wear and enhance durability. Additionally, high-quality transmission fluid designed for the 8L90 can often prevent further issues, as it helps maintain the proper performance of the torque converter.

Overheating and Fluid Degradation

The 8L90 transmission can quickly reach high temperatures, especially during heavy towing, off-road driving, or prolonged use in stop-and-go traffic. Overheating not only impacts the transmission’s immediate performance but also accelerates the degradation of transmission fluid, which can lead to internal wear and component failure.

How Upgrades Can Help: 

Adding an external transmission cooler is an effective upgrade to combat overheating. By controlling fluid temperatures, a transmission cooler helps maintain optimal performance and prolongs the life of the transmission. Additionally, high-performance fluid with superior thermal stability is another worthwhile investment for those pushing their 8L90 transmission to its limits.

Harsh or Slow Shifting

Experiencing delays or harshness while shifting gears is another common complaint among 8L90 owners. These symptoms often result from faulty solenoids, valve body issues, or software calibration problems. Prolonged operation under such conditions can cause further damage to the system.

How Upgrades Can Help: 

Installing a performance shift kit can refine the shifting characteristics of your 8L90 transmission. These kits allow for smoother, faster gear changes by improving hydraulic flow and modifying pressure points within the transmission. Coupled with proper tuning, a shift kit can restore a smooth driving experience while increasing gear response time.

Weak Clutch Packs

The clutch packs in the 8L90 transmission, which are responsible for transferring power between gears, are another area prone to failure under high-stress conditions like hard accelerations, towing, and spirited driving. Damaged clutch packs can lead to poor power delivery and overall transmission inefficiency.

How Upgrades Can Help: 

High-performance clutch packs are designed to handle significant loads and wear, making them an ideal upgrade for vehicles with the 8L90 transmission. Upgraded clutch packs use advanced friction materials that withstand high-pressure levels and heat, ensuring durability under demanding conditions.

Driveline Vibrations

While not as common as the other issues, driveline vibrations in vehicles equipped with the 8L90 transmission can still occur, particularly if there's an imbalance or misalignment in the driveshaft. These vibrations can impact both performance and comfort.

How Upgrades Can Help: 

Inspecting and replacing the driveshaft with an upgraded, performance-focused model is an effective solution to this issue. High-quality driveshafts are specifically designed to reduce vibrations and improve overall driveline efficiency. Combining this with upgraded mounts and bushings can further stabilize the system.

The Role of 8L90 Transmission Upgrades

Upgrading your 8L90 transmission isn’t just about fixing problems—it’s an investment in your vehicle’s performance and reliability. By implementing durable, high performance parts, you ensure your transmission can handle increased stress, extreme conditions, and higher torque demands. 

Check out the best solutions for 8L90 transmission issues by exploring 8L90 transmission upgrades. Circle D Transmission offers a range of performance parts expertly designed to fix common problems and enhance your transmission for peak functionality. 

Frequently Asked Questions About 8L90 Performance Transmission Parts

What are the benefits of performance upgrades for the 8L90 transmission? 

Performance upgrades improve the durability and reliability of your 8L90 transmission under tough driving conditions. They prevent common issues like overheating, shuddering, and slow shifts while enhancing gear response and power delivery, making for a more efficient and enjoyable drive. 

How can I tell if my 8L90 transmission needs upgrades? 

Signs that your 8L90 transmission may need upgrades include delayed or harsh shifting, shuddering during operation, overheating, or recurring maintenance issues. If you regularly push your vehicle to its limits, upgrades can also prevent future problems and optimize performance.

Circle D Transmission has been a trusted name in the transmission industry since 1976, specializing in repairs, rebuilds, and performance upgrades. Their experts serve auto enthusiasts and car owners, offering cutting-edge solutions for transmissions, including the 8L90. Learn more at Circle D Transmission.

When the 8L90 transmission was first introduced, it was a significant technological advancement. Made by General Motors, this 8-speed transmission is more efficient and lightweight than the previous 6-speed transmissions and was designed for high performance vehicles such as the Chevrolet Silverado, the Cadillac CT6, and Chevrolet Corvette. 

While the 8L90 transmission was far superior to previous transmissions at the time, some design flaws were discovered over time. If you happen to have a vehicle with an 8L90 transmission, you may have experienced a few problems. But worry not. Some basic upgrades can correct common issues with your transmission. 

Consider the top 5 essential 8L90 transmission upgrades for improved performance. 

1. Clutch Packs. 

It can help to add extra clutches to some clutch packs in order to increase capacity. Replacing friction plates with high-performance friction material, such as high-energy fibers, allows for smoother shifting and reduction in shuddering. 

2. Steel Plates.

The stock steel plates on an 8L90 transmission tend to fail under heavy loads, resulting in poor shifting and slipping clutches. Replacing them with stronger steel plates improves transmission performance with increased torque capacity and improved heat dissipation. 

3. Input Shaft. 

Upgrading the input shaft on an 8L90 transmission can improve performance for heavy towing and high horsepower situations. The use of 300M alloy steel increases strength, durability, and longevity of your transmission. 

4. Valve Body. 

Replacing the valve body reduces internal leaks, worn components, and inefficient hydraulic pressure. These problems often lead to sluggish shifting and excessive heat generation, which ultimately shorten the lifespan of your transmission. Upgraded solenoids and pressure regulators can improve performance. 

5. Pump

Upgrading the pump on your 8L90 transmission improves fluid flow, which maintains the proper level of lubrication and temperature. This prevents harsh shifting and slipping gears. 

*Bonus: Torque Converter 

Torque is how a vehicle gets its power. The torque converter is responsible for transferring the power created by the engine to the transmission. By upgrading the torque converter in your 8L90 transmission, you can improve acceleration, towing capacity, and shifting all while reducing wear and extending the lifespan of your transmission. 

Why Bother With 8L90 Transmission Upgrades? 

There are many reasons that vehicle owners are willing to invest the time and money into upgrading their 8L90 transmissions: 

• Keep your current vehicle. If you have a vehicle you love that just happens to have an 8L90 transmission, it may be worth making the necessary upgrades to keep it running. Perhaps the vehicle has sentimental value or you simply enjoy driving it. You don’t have to give up a beloved car or truck due to a faulty transmission. 

• Improved performance. 8L90 transmission upgrades significantly improve the performance of your vehicle in a variety of ways from smoother shifting to increased power. 
• Costs less than replacing your transmission. Making upgrades or rebuilding your current transmission will most likely cost less than replacing your transmission or buying a new vehicle. 

Frequently Asked Questions About the 8L90 Transmission 

What is the life expectancy of an 8L90 transmission without upgrades? 

A factory 8L90 transmission can last 150,000 to 200,000 miles in some cases with regular upkeep and maintenance. 

What vehicles come with 8L90 transmission? 

The Chevrolet Silverado, GMC Sierra, Chevrolet Corvette, Chevrolet Camaro, Cadillac CT6, and the GMC Yukon all come equipped with an 8L90 transmission from the manufacturer. 

Who Can I Trust to Upgrade My Transmission? 

Circle D Transmission is a trusted expert in transmission repair, rebuild, or replacement. If you need 8L90 transmission upgrades or repairs, we specialize in this area of service. We provide upgrades and complete rebuilds, as well as high quality parts. 

Call 713-895-7019 or contact us today to learn more or schedule service. You can also order parts directly from our website. 

The 8L90 transmission is a high performance option for your vehicle. Created by General Motors, the 8L90 is an 8-speed automatic transmission that is designed to be more efficient and out-perform previous models. Whether you’re an automotive enthusiast, DIY mechanic, or a day-to-day driver, you know that a well-maintained transmission is crucial to vehicle longevity. Here’s what you should know about the 8L90 transmission performance upgrades to get the best from your transmission. 

What is an 8L90 Transmission? 

Regular use of the 8L90 transmission began in 2014. This 8 speed automatic transmission replaced the previous 6 speed transmissions, providing more power with improved fuel-efficiency. It was first introduced in high-power vehicles such as the Chevrolet Silverado, GMC Sierra, GMC Denali, Corvette, Camaro, and several Cadillac models. 

Common Issues 

Despites its performance and efficiency, the 8L90 transmission is not without flaws. Common issues include:

• The torque converter is prone to vibrations at high speeds and ballooning or expanding due to pressure buildup. 

• The input shaft fails to support extreme pressure or weight due to its structural inferiority. 

• The valve body is a complex system designed to facilitate smoother shifting, but it often causes overheating. 

• The C2 clutch assembly results in higher risk of slippage or failure in the overdrive gears (gears 4-8). 

• The oil pan lacks volume, leading to higher oil temperatures due to lack of ventilation space. 

Performance Upgrades for the 8L90 Transmission

The following upgrades can improve performance and reduce the impact of common issues: 

Cooling System: 

• Upgrading the transmission pan provides more space for even heat distribution. 
• Adding a high performance transmission cooler helps regulate temperature.

Internal Components:

• Reinforced clutch packs include higher quality materials that hold up under pressure. 
• Hardened planetary gears reduce wear and tear due to high speeds
• Billet input shaft to replace lower quality factory parts. 
• Replace seals and gaskets with upgrades to prevent leaks. 

Torque Converter: 

• Upgrade your torque convertor according to your vehicle model to meet your specific power and acceleration needs. 

Performance Rebuild Kits 

• Kits are available to rebuild your 8L90 transmission to address problems and improve performance. Stage-specific rebuilds and custom valve body modifications can provide more power and improve shift timing. 
  
  

Maintenance Tips to Improve Longevity of your 8L90 Transmission

• Regular fluid changes. By following the manufacturer recommended schedule for fluid changes you can extend the life of your transmission.

• Use high performance transmission fluid. Reduced friction and higher temperature thresholds are possible with transmission fluid that is designed for high performance. 
• Go to a trusted transmission expert. The 8L90 transmission can be complex and potentially problematic. But with service from the right transmission expert you can upgrade parts or replace your system for better performance and longevity. 
  
  

When To Upgrade 

If your vehicle is currently equipped with an 8L90 transmission, you may want to consider making some upgrades. While your vehicle may be operating well currently, being proactive and addressing some of the common problems with this type of transmission can help you avoid expensive repairs down the road. With a few 8L90 transmission upgrades, you could get many more years out of your vehicle.

Contact Circle D Transmission

Having problems with your 8L90 transmission? Circle D Transmission provides service, upgrades, and complete rebuilds of this complex model. We specialize in vehicle transmissions of a wide variety of makes and models, helping you get the best performance and the most years possible from your vehicle. 

Call 713-895-7019 or contact us today to learn more and schedule service. 

When it comes to major transmission work, we at Circle D Transmission prioritize providing reliable, high-quality solutions. For most cases where your vehicle requires a complete transmission rebuild, we use remanufactured transmissions from either the original equipment (OE) manufacturer or Jasper Engines and Transmissions. 

Here’s why this is the best approach for our clients, explained through five key reasons.

Reason 1: Quality Assurance with Trusted Brands

Using remanufactured transmissions from OE manufacturers or Jasper Engines & Transmissions ensures a high level of quality. These transmissions are produced by industry leaders that have established rigorous standards for performance and durability. Jasper, for example, is known for its meticulous remanufacturing process that restores transmissions to meet or exceed their original specifications. This means that each unit is thoroughly inspected and rebuilt using premium-grade parts, resulting in reliable, high-performance products. By sourcing transmissions from such reputable manufacturers, we can confidently assure our clients that they are receiving the best product available on the market.

Reason 2: Comprehensive Nationwide Warranty

Both OE manufacturers and Jasper Engines & Transmissions offer a robust 3-year or 100,000-mile, whichever comes first, warranty that covers parts and labor. This warranty provides clients with peace of mind, knowing that no matter where they are in the U.S., their investment is protected. Should any issues arise, you can trust that repairs will be taken care of by certified professionals, ensuring you’re never far from quality service. This nationwide warranty is especially important for those who travel frequently or relocate, as it ensures that coverage remains consistent across different regions. The comprehensive nature of this warranty underscores our commitment to providing lasting value and dependable service for your vehicle.

Reason 3: Faster Turnaround Times

Time is valuable, and a lengthy repair process can be inconvenient. By using remanufactured transmissions, we can often minimize the time your vehicle spends in the shop. Unlike custom rebuilds that might take weeks, remanufactured transmissions are usually available more quickly, enabling us to restore your vehicle’s functionality faster and get you back on the road. The streamlined supply chain for these remanufactured units allows for prompt delivery and installation, helping us avoid the typical delays associated with sourcing individual parts and manual rebuilding. This efficiency means less disruption to your daily life and a quicker resolution to your transmission issues.

Reason 4: High Reliability and Performance

Remanufactured transmissions are built with quality control processes. Each unit is tested to confirm it meets stringent operational standards before being sold. This means clients receive a transmission that is as dependable as a new one and sometimes even enhanced for better performance, providing both safety and longevity for your vehicle. Advanced testing procedures, such as dynamometer testing, simulate real-world conditions to verify that the transmission will perform seamlessly once installed. This attention to detail ensures that remanufactured units provide consistent, superior performance with minimal risk of failure.

Reason 5: Cost-Effective Solution

Choosing a remanufactured transmission can often be more cost-effective in the long run. The precision and consistency offered by Jasper and OE manufacturers mean fewer issues down the line, which translates to fewer repair costs and potential savings over time. Coupled with the extensive warranty coverage, this choice is a smart financial decision for vehicle owners. Additionally, the improved reliability of these transmissions means you are less likely to face repeated breakdowns or unforeseen expenses, which can be financially and emotionally taxing. Investing in a remanufactured transmission is an investment in your vehicle’s longevity and your peace of mind.

Why Choose Circle D Transmission?

At Circle D Transmission, we’ve built a strong reputation over nearly 5 decades in business. Clients choose us not only for our expertise in transmission services but also for the trust and confidence we’ve fostered within the community. Our dedicated team ensures that every client receives unparalleled service backed by our commitment to quality and integrity. We take pride in our transparent communication, honest assessments, and dedication to delivering results that exceed expectations. Don’t just take our word for it—check out our Google reviews to see what our clients have to say. From start to finish, we aim to make your experience smooth and satisfactory, reinforcing why we’ve been a trusted name in transmission repair for so long.

Trust Circle D Transmission for your vehicle’s transmission needs and experience the peace of mind that comes with choosing the best in the business. Contact us today to learn more.

The transmission is a crucial part of a vehicle. It transfers power from the engine to the wheels to make the car move. It is also called the gearbox because it shifts the gears in the vehicle to increase or decrease speed. A vehicle may have an automatic transmission where the gears shift automatically as you accelerate or decelerate, or it may have a manual transmission, which means the driver must shift the gears. 

A vehicle’s transmission is built to last for around 100,000-150,000 miles with regular maintenance, but it may last longer or fail sooner depending on many factors. What are the signs of a failing transmission? How do you know when to seek transmission repair? Learn to recognize the common indicators. 

Check Engine Light Comes On 

As you probably know, the check engine light in your vehicle may come on for any number of reasons. If you take your car to a mechanic, they can check the code that indicates the reason for the check engine light. It may indicate that there is a problem with your transmission, or it may be something else entirely. 

Shifting is Rough or Hesitant 

If your automatic transmission is not shifting smoothly or as soon as you think it should, you may need to seek repair. In a manual transmission, if you feel that the gears are grinding or not shifting smoothly, it may mean that repair is necessary. 

Leaking Transmission Fluid 

If you notice any leakage underneath your car, it could be your transmission fluid. Transmission fluid tends to look dark brown or red in color. It is not as thick as oil, but thicker than brake fluid, so you may need to inspect it closely. If it smells burnt, that indicates a problem with your transmission. 

A Burning Smell When Driving or After Parking 

When your transmission is not working properly it can become overheated or burn transmission fluid, which results in a burning smell. You will typically notice it while you are driving or after you have driven for a while and then park. It may intensify as the gears shift, especially in city driving when you are constantly changing speeds. 

Excessive Shaking of the Center Console 

A failing transmission can cause vibrations or shaking of the center console where the gear shift is located. This could indicate a lack of transmission fluid or contamination of the existing fluid. It could also be caused by a damaged clutch that needs to be replaced. 

Abnormal Noises Coming From Under Your Vehicle

If you hear unusual noises or a sudden increase in noise coming from under your vehicle, it is most likely due to problems with your transmission. Noises from the engine indicate other problems, but the transmission is located under the center console in most vehicles. Be careful not to confuse it with your muffler, which is located near the rear bumper of the car and will cause excessive noise if it is damaged. 

Where To Seek Repair 

In the Houston area, there is no better transmission repair center than Circle D Transmission. We specialize in transmission diagnosis and repair on a wide variety of vehicle makes and models, including performance transmissions. We source quality parts for transmission repairs, rebuilds, and conversions. 

If you’re having any problems with your transmission, call 713-895-7019 or contact us today to schedule a service appointment. 

Your transmission plays an essential role in your vehicle. Essentially, a transmission transfers the power the engine generates to the wheels. It also controls the degree of power the wheels receive, ensuring you can moderate your speed and reliably start and stop a vehicle.

Just like many car components, a transmission is a complex piece of machinery. That means it requires regular maintenance.

Don’t delay in scheduling this service! Staying on top of maintenance now can save you more money on repair bills in the long run.

Why Regular Transmission Maintenance is Essential

There are many reasons consistent transmission maintenance is vital. The following are merely some particularly noteworthy examples:

• Identifying problems: There may be times when it’s necessary to repair or completely replace a transmission. No automotive part lasts forever. However, regular maintenance can help you extend a transmission’s lifespan. During maintenance tasks, a transmission repair professional may spot the warning signs of developing problems. Addressing minor issues now before they become more significant problems can benefit both your safety and wallet.

• Saving money on gas: Often, a properly-working transmission will help a vehicle optimize its gas mileage. You may save money at the pump (and conserve resources) by staying on top of transmission upkeep.

• Topping off transmission fluid: The team performing transmission maintenance will usually check to confirm whether your transmission needs more fluid. They will typically add more if necessary. Ensuring your transmission has sufficient fluid will prevent it from overheating. In addition, proper lubrication can reduce wear and tear on your transmission. This is another way in which regular transmission maintenance can maximize a transmission’s lifespan.

You may also notice your vehicle operates more smoothly after undergoing transmission maintenance. Be aware, many components of a motor vehicle affect each other. A transmission that’s in good working order will optimize the lifespan of the entire vehicle.

DIY Transmission Maintenance Tips

There are some transmission maintenance tasks, like thorough inspections, that professionals must perform. Check your vehicle’s owner’s manual to learn how often the manufacturer suggests scheduling transmission maintenance.

However, there are some basic steps you can take on your own to improve a transmission’s performance and guard against failure. They include:

• Check fluid levels: Your owner’s manual should include information regarding how to check transmission fluid levels and how often you should do so. Follow the manufacturer’s recommended schedule.

• Check for leaks: Monitor the areas where you park your vehicles for signs of fluid leaks. Transmission fluid often appears red when it leaks. However, in some cases, it may appear blue or green. Regardless of the color, you should always have a professional take a closer look when your vehicle is leaking any type of fluid.

A professional can also offer additional tips for keeping your transmission in good shape. By scheduling regular maintenance and following professional advice, you’ll save a lot of money on repair service in the long run.

Contact Transmission Repair Professionals in Houston

At Circle D Transmission, in Houston, Texas, we specialize in transmission services and performance transmissions. This type of specialization ensures we can address virtually any transmission issue you may need help with. Learn more about what we can do for you by contacting us online today.