Circle D – 6L80 Performance Transmission Rebuild Kit – CDT Level 4

This part is designed for vehicles producing over 750 RWHP, Nitrous or Heavy Vehicles (including trucks, SUV’s and CTS-V’s).

It is a drop in part for easy installation.

CDT456L4/80 (4-5-6 CLUTCH KIT)
7 G3® Clutches
9 Lindered Steels (varying thicknesses)
1 Stepped Apply Plate
1 Wide Backing Plate
1 Snap Ring
2 Hi-Per Blue® Bonded Pistons

CDT456L4/80 offers 50% more clutch apply area than stock. G3® friction material is formulated to achieve minimal wear and maximize heat resistance. Lindured is a chemical and heat treatment process that hardens the steel, which results in less wear. Hi-Per Blue® Pistons are manufactured with upgraded High Performance Blue AEM material for superior thermal and chemical resistance, with better fit and performance.

104680-45 (ONE PIECE BILLET INTERMEDIATE SHAFT & 4-5-6 CLUTCH HUB)
One-piece 300M steel forging is heat-treated and shot-peened for maximum durability. This shaft doubles oil flow to the clutch pack for improved resistance to heat and longer clutch life. The hub is designed for use with 45-tooth clutch plates. This shaft is designed for use without OE dampner.

CDT35RL4/80 (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

CDT35RL4/80 offers 50% more clutch apply area than stock. High Energy material maintains consistent frictional behavior and tolerates extreme thermal stress applications. Kolene® Steels provide a surface treatment that enhances wear & fatigue resistance.

CDT26L4/80 (2-6 CLUTCH KIT) 
5 Red Eagle® Externally Splined Clutches
5 Red Eagle® Internally Splined Clutches
1 Externally Splined Plate
1 Snap Ring
1 Hi-Per Blue® Bonded Piston

Red Eagle® Clutches are designed to limit the amount of slip providing a shorter apply time, generating less heat. Hi-Per Blue® Pistons are manufactured with upgraded High Performance Blue AEM material for superior thermal and chemical resistance with better fit and performance.

CDT1234L4/80 (1-2-3-4 CLUTCH KIT)
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 manufactured with upgraded High Performance Blue AEM material for superior thermal and chemical resistance with better fit and performance.

CDTLRL4/80 (LOW-REVERSE CLUTCH KIT)
5 High Energy® Clutches
5 Steels
1 Hi-Per Blue® Apply Piston

Hi-Per Blue® Pistons are manufactured with upgraded High Performance Blue AEM material for superior thermal and chemical resistance with better fit and performance.

CDTVBPKL4/80-90 (VALVE BODY & PUMP KIT)
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

CDTMKL4/80 (MASTER KIT)
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

We do not include welded hubs in Kit. In the beginning of R&D on this transmission we thought this area needing strengthening. However, in all the units that we’ve rebuilt we’ve NEVER seen one broken. Therefore, we deemed it unnecessary. Also, we do not include a billet pump rotor because the factory pump rotor has proven itself reliable (we have never seen one broken) unlike the 4L60E.