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Monday thru Friday 7:00 am to 5:00 pm CST
Texas - Central Time
Our CDT Level 3 6L80 built transmission is engineered for serious performance and durability, making it an ideal choice for heavy duty vehicles and high‑horsepower builds. This comprehensive bench job rebuild includes expert labor and premium components such as a billet pump rotor, friction components, piston kit, and a billet converter designed to maximize holding capacity, balance performance, and long‑term reliability. Optimized gear ratios ensure efficient power transfer, while every component is carefully inspected and replaced as needed to meet demanding performance standards.
You’ll need to ship your transmission to us for the rebuild, but if you’d prefer that we supply a transmission core, please contact us for current availability.
$5,235*
7 G3® Clutches
8 Lindered Steels (varying thicknesses)
1 Stepped Apply Plate
1 Wide Backing Plate
1 Snap Ring
2 Hi-Per Blue® Bonded Pistons
The CDT456L3/80 6L80 built transmission provides 50% more clutch apply area than stock, boosting holding capacity and durability for heavy duty vehicles and high‑performance builds. Advanced friction components with G3® friction material reduce wear and maximize heat resistance, while Lindured‑treated steel increases strength and longevity. Upgraded Hi‑Per Blue® pistons made from premium Blue AEM material offer superior thermal and chemical resistance for better fit and performance. With a precision‑engineered billet pump rotor, piston kit, optimized gear ratios, and a billet converter, this rebuild delivers exceptional power, balance performance, and long‑term reliability, even when parts need to be replaced.
The one‑piece 300M steel forging is heat‑treated and shot‑peened for maximum durability, ensuring superior strength in demanding applications. This shaft doubles oil flow to the clutch pack, improving resistance to heat and extending clutch life. The hub is designed for use with Powerglide‑style, 45‑tooth frictions, and the shaft is engineered for use without the OE dampener. Combined with premium friction components and optimized gear ratios, it enhances balance performance and durability in both performance cars and heavy duty vehicles. The design works seamlessly with a billet pump rotor and piston kit to further increase holding capacity and overall reliability. When paired with a billet converter, this upgrade maximizes power transfer and ensures critical parts can be serviced or replaced without sacrificing strength or longevity.
6 G3® Keyhole Clutches
6 Kolene® Steels (varying thicknesses)
1 Steel Plate
1 Apply Ring
1 Backing Plate
1 Snap Ring
CDT35RL3/80 offers 50% more clutch apply area than stock. G3® friction material is formulated to achieve minimal wear & maximize heat resistance. Keyhole Clutch design allows a significant amount of ATF to escape out of the O/D and I/D channels to improve clutch engagement. The pooling of ATF in the slot and hole separates the friction and steels when the clutch is disengaged reducing parasitic drag and heat build-up. Kolene® Steels provide a surface treatment the enhances wear & fatigue resistance.
5 Red Eagle® Externally Splined Clutches
5 Red Eagle® Internally Splined Clutches
1 Externally Splined Steel Plate
1 Snap Ring
1 Hi-Per Blue® Bonded Piston
Red Eagle® Clutches are designed to limit slip, providing a shorter apply time and generating less heat for greater efficiency and durability. Hi‑Per Blue® Pistons, built with upgraded High Performance Blue AEM material, deliver superior thermal and chemical resistance along with a better fit and improved performance. Combined with advanced friction components, these upgrades significantly boost holding capacity and balance performance under extreme conditions. The integration of a billet pump rotor and piston kit ensures consistent fluid pressure and optimized gear ratios for smoother power delivery. When paired with a billet converter, the system enhances power, durability, and overall reliability, making it ideal for heavy duty vehicles and high‑performance builds where parts are often upgraded or replaced.
5 High Energy® Clutches
5 Steels
1 Backing Plate
1 Snap Ring
1 Spiral Snap Ring
1 Snap Ring Kit
1 Hi-Per Blue® Bonded Piston
Hi‑Per Blue® Pistons are engineered with upgraded High Performance Blue AEM material, providing superior thermal and chemical resistance along with a precise fit for enhanced performance. Designed to deliver balanced performance under ultimate stress, these pistons reflect the quality and reputation of a trusted performance brand. Developed with attention to the smallest details, they help reduce weight while maintaining durability, making them ideal for high‑power builds, including turbo applications. Each piston is carefully developed to withstand the demands of the road and track, ensuring reliable operation and long service life even in extreme conditions.
5 High Energy® Clutches
5 Steels
1 Hi-Per Blue® Apply Piston
Hi‑Per Blue® Pistons are crafted with upgraded High Performance Blue AEM material to provide superior thermal and chemical resistance, along with a precise fit for improved performance. Engineered for balanced performance under ultimate stress, they deliver the quality and durability expected from a leading performance brand. Designed with meticulous attention to details, these pistons reduce weight while maintaining strength, making them ideal for turbo applications and high‑power builds. Each set is carefully developed to perform reliably on the road and track, ensuring long‑lasting power and efficiency.
2 Boost Valve Springs
2 Clutch Regulator Valve Springs
1 Center Support Seal Kit
1 Pressure Regulator Valve Kit
1 Line Pressure Booster Kit
1 O-Ringed End Plug Kit
1 Pump Slide Spring
1 High Performance overhaul kit engineered utilizing premium materials for racing.
1 Bonded OE Valve Body Plate
1 Bushing Kit (includes extension housing bushings)
1 Pan Gasket
1 Filter
1 Oversized Pump Washer
*$5,235 does not include any Hard Part damage, Torque Converter or TCM/ECM tuning. After aninternal inspection of your transmission we will notify you of any hard part damage that will carry an additional cost. Also, if your vehicle is pre-2010 we may need to install a new upgraded pump stator (cover) and 1-2-3-4/3-5-R drum.
We recommend the Billet Reinforced Output Carrier for vehicles producing over 750 RWHP, Nitrous or Heavy Vehicles (including trucks, SUV's and CTS-V's.) Note: We have seen the stock output carrier (planetary) break in vehicles with less than 750 RWHP. We do not warranty the stock output carrier (planetary) in any of our rebuilds. We highly recommend that you purchase the billet reinforced output carrier. We offer a 6L80 Level 4 Rebuild that includes this part.
Warranty varies according to application. Please refer to Warranty Info page on our website.
Shipping If you need assistance shipping your transmission, we can arrange Domestic Shipping (averages $250 - $500 each way) for your transmission. Please complete the Shipping Questionnaire on our website (listed under the Contact Us tab) if your would like us to arrange shipping.
Transmission Tuning We do not supply a TCM or ECM tune. Please understand that proper tuning of the TCM and ECM are mandatory. All 6L80’s are torque base shifted units. The torque signal is calculated thru the ECM. Therefore, transmission performance & longevity are directly dependent on the delivered torque signal that’s calculated in the ECM. If this is not done properly, you will experience premature transmission failure. We also do not recommend maxing out pressures or deleting torque management completely because it will cause seal failure and/or hard part breakage. Please contact us for tuner recommendations. A review of final tune and final log files is included. Once your final tune and log reviews meet our requirements we will document this in our records for warranty purposes. Please only drive the vehicle for tuning purposes until this process is completed.
Flushing Cooler & Lines We cannot stress enough the importance of flushing the transmission cooler(s) and lines, even if they are new. We recommend using a Hot Flush Machine or something comparable.
Auxiliary Cooler You need to install a stacked plate auxiliary transmission cooler (not a tube & fin style cooler) rated for 25,000 GVW. The ideal operating temperature for this transmission is 180°or less. These transmissions have a tendency to run very hot – the cooler will lower operating temperature and recovery time which in turn will extend the life of your transmission.
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Stay Safe and Have Fun!
The Crew at CDT
The CDT Level 3 6L80 built transmission is engineered for high‑horsepower and heavy duty vehicles, rated up to 750 RWHP. Unlike a stock rebuild, it includes premium upgrades such as a billet pump rotor, billet converter, advanced friction components, Hi‑Per Blue® pistons, and optimized gear ratios. These enhancements increase holding capacity, improve balance performance, and provide long‑term reliability under extreme stress.
A billet pump rotor ensures consistent fluid pressure and improved durability, while a billet converter maximizes power transfer and reduces slippage. Together, they deliver superior balanced performance, extending transmission life and supporting the high torque loads found in heavy duty and turbo applications.
Both G3® friction material and Red Eagle® clutches are designed to limit slip, shorten apply time, and resist heat buildup. Paired with Lindured steels and advanced piston kits, these friction components increase holding capacity and improve clutch life, even in ultimate stress conditions like racing, towing, or boosted turbo setups.
Yes. Proper TCM and ECM tuning is mandatory for a CDT Level 3 6L80 rebuild. Since the 6L80 is torque‑based, tuning ensures the ECM delivers the correct torque signal for optimal reliability and power delivery. Failure to tune correctly can lead to premature wear, seal failure, or hard part breakage. CDT provides review of your final tune and log files to document compliance for warranty purposes.
For vehicles producing more than 750 RWHP, using nitrous, or classified as heavy duty vehicles such as trucks, SUVs, and CTS‑Vs, CDT highly recommends a billet reinforced output carrier. The stock carrier is known to break under ultimate stress, sometimes even below 750 RWHP. For maximum quality, balanced performance, and peace of mind, CDT also offers a Level 4 Rebuild which includes this upgrade.