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6L80 Performance Transmission 3-5-R Clutch Kit - Level 3

Detailed Instructions Included | FREE UPS Ground to the contiguous United States (lower 48)

This 3-5-R clutch pack offers 50% more clutch surface area than stock, making it an ideal upgrade for enhancing the performance and longevity of 6L80 transmissions. Designed for automatic transmission systems where clutch shifting precision is critical, this high-performance pack is engineered to handle increased power and torque without compromising durability. The increased friction material improves transmission performance under heavy load conditions and aggressive driving styles, helping your car maintain optimal shift quality and responsiveness.

Built from the highest-quality material, the pack includes components that are identical in dimension to OEM parts, ensuring the correct fit upon install. Whether you’re working on performance vehicles or replacing a worn-out shaft assembly in a daily driver, this clutch pack is designed to be a virtually seamless upgrade that can be replaced with confidence. When paired with a properly functioning transmission control module, the system maintains full control over shift timing and pressure for smooth, consistent engagement.

This clutch pack features advanced heat and wear resistance to reduce trouble associated with high-load conditions, extending the overall life of the transmission. For automotive enthusiasts and technicians aiming to achieve greater reliability and performance from their 6L80 transmission, this is a must-have component.
Availability: In stock
In stock items ship within 1-2 business days.
Picture for representation purposes only. Actual contents may vary as we continue to develop our products.
$525.00
SKU: CDT35RL3/80-P

CDT35RL3/80-P (3-5-R CLUTCH KIT) – Built for Power, Performance & Durability

The CDT35RL3/80-P is a premium 3-5-R clutch kit designed to dramatically improve transmission performance in 6L80 transmissions. This comprehensive kit features high-quality components engineered for optimal durability, thermal resistance, and reliable clutch shifting under high torque conditions. Ideal for both daily driving and performance vehicles, it delivers 50% more clutch apply area than stock, increasing overall holding capacity and power handling.

CDT35RL3/80-P (3-5-R CLUTCH KIT)

  • 6 Borg Warner® High Energy Clutches
  • 6 Kolene® Steels (varying thicknesses)
  • 1 Steel Plate
  • 1 Apply Ring
  • 1 Backing Plate
  • 1 Snap Ring
  • 1 1-2-3-4 Modified Backing Plate

Engineered Control & Precision for 6L80 Transmission Upgrades

With High Energy material that maintains consistent frictional behavior and withstands extreme thermal stress, this kit is ideal for automatic transmission systems requiring dependable shift performance. The included Kolene® steels feature a specialized surface treatment that boosts wear and fatigue resistance, making this kit suitable for high-performance applications.

Whether you’re looking to replace worn-out transmission parts or planning a full rebuild, this kit helps you achieve enhanced drivability, control, and reliability. Compatible with stock shaft setups and designed for virtually seamless install, all parts are identical in fit and material to OEM, ensuring the correct upgrade without modification.

Ideal for mechanics and enthusiasts seeking increased performance and durability from their 6L80 transmission, this clutch kit is your go-to solution for advanced transmission functionality and trouble-free operation.

Frequently Asked Questions

What makes the CDT35RL3/80-P clutch kit ideal for 6L80 transmissions?

The CDT35RL3/80-P clutch kit is engineered specifically for 6L80 transmissions, offering 50% more clutch apply area than stock. This increased surface enhances transmission performance, especially under high-load or high-torque conditions. With High Energy friction material and Kolene® steels, the kit improves durability, reduces wear, and supports more consistent clutch shifting.

Can I install the CDT35RL3/80-P clutch kit in a high-performance or modified vehicle?

Yes, this clutch kit is ideal for performance vehicles or cars with upgraded power systems. The transmission components are designed to withstand extreme thermal and mechanical stress, making it suitable for street/strip applications where automatic transmission control and responsiveness are crucial.

What are Kolene® steels and why are they used in this clutch kit?

Kolene® steels are heat-treated plates with a special surface treatment that significantly enhances fatigue resistance, wear protection, and thermal stability. They’re chosen for this kit to improve shift reliability and extend transmission lifespan under demanding conditions.

Will the CDT35RL3/80-P clutch kit require any modifications to install?

No, the CDT35RL3/80-P is designed to be a virtually drop-in solution. All components are identical in size and material to OEM parts, ensuring the correct fit with no need for modifications. It’s built for ease of install, whether you’re a DIY builder or a professional installer.

How does increasing clutch surface area affect transmission performance?

A 50% increase in clutch surface area results in greater holding capacity, improved control during shift events, and better heat dissipation. This allows your transmission to manage higher power levels while maintaining consistent performance and reducing long-term trouble with slipping or premature wear.

transmission specs worksheet

Recommended Transmission Tools

  • Transmission holding fixture
  • Calipers
  • Dial Indicator Set
  • Bushing Drivers & Arbor Press for Bushing Installation (Bushings should only be replaced as needed)
  • Sealing Ring Protector and Sizer
  • Various Clutch Spring Compressors
  • Output Carrier/Shaft Lifting Tool
  • 1-2-3-4 & 3-5-R Clutch Housing Installer
  • Large Snap-Ring Pliers
  • Pump Alignment Tool

Misc. Transmission Information

Upgraded Parts: If you have an early pump cover (stator) that does not utilize anti-rotational tabs on the sealing rings or an early 1-2-3-4/3-5-R clutch housing that does not have the matrix stamp, you will need to install a factory-upgraded pump cover and clutch housing.

Transmission Tuning: Please understand that proper tuning of the TCM and ECM is mandatory. All 6L80/90’s are torque-based shifted units. The torque signal is calculated through the ECM. Therefore, transmission performance and 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.

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 Flush Machine or something comparable.                                      

Auxiliary Cooler: You need to install a stacked plate auxiliary transmission cooler (not a tube and fin style cooler) rated for 25,000 GVW. The ideal operating temperature for this transmission is 180°or less. These transmissions tend to run very hot, so the cooler will lower the operating temperature and recovery time, which in turn will extend the life of your transmission.

Transmission Rebuild Kit Warranty

Limited Warranty Statement

Circle D's Transmission Rebuild Kits carry a 1 year, parts-only warranty, exclusively against manufacturer’s defects. The warranty period begins at the date of purchase. There is no warranty under the conditions listed below. This includes, but is not limited to:

  • Improperly Stored
  • Improperly Installed
  • Improperly Tuned (EMC or TCM)
  • Misapplication
  • Altered, either by Owner or Their Technician
  • Torque Converter Failure
  • Inadequate Flushing of Transmission Cooler
  • Improper Fluid Level
  • Water/Engine Coolant in Transmission
  • Excessive Power
  • Accident
  • Neglect

Circle D Transmission will not pay for any fluids replaced in the event of a rebuild kit failure.

Under no circumstances shall there be any labor warranty or other warranty coverage on Circle D Transmission Kits beyond the replacement of individual rebuild kit components. We will not provide you with any cash refund except as may be required by law. Consequential and incidental damages are not recoverable under this warranty and are expressly excluded.

There is no warranty on broken parts such as, but not limited to, twisted splines, broken shafts, or broken planetaries.

Warranty issues will be considered on an individual basis.