6L80 Performance Transmission Rebuild Kit - Level 3
Rated up to 750 RWHP. HP ratings are contingent on numerous factors, such as tune, vehicle weight, power adder, use, etc.
Detailed Instructions Included | FREE UPS Ground to the contiguous United States (lower 48)
The 6L80 Transmission Rebuild Kit is designed with 45-tooth 4-5-6 clutch plates. Circle D Transmission's billet 4-5-6 clutch hub and intermediate shaft (CDT part number 104680-45) are included in this kit. The 4-5-6 clutch pack provides 50% more surface area than a stock clutch set-up, and the 3-5-R clutch pack offers 50% more clutch area than 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.
CDT456L3/80 (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
The CDT456L3/80 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 transmission performance.
104680-45 (1-PIECE BILLET INTERMEDIATE SHAFT & 4-5-6 CLUTCH HUB)
One piece of 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 Powerglide-style, 45-tooth frictions. This shaft is designed for use without an OE dampener.
CDT35RL3/80 (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
The CDT35RL3/80 offers 50% more clutch apply area than stock. The high-energy material maintains consistent frictional behavior and tolerates extreme thermal stress applications. Kolene® Steels provide a surface treatment that enhances wear and fatigue resistance.
CDT26L3/80 (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 application time and 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 vehicle performance.
CDT1234L3/80 (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, which provides superior thermal and chemical resistance and better fit and transmission performance.
CDTLRL3/80 (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, which provides superior thermal and chemical resistance and better fit and balanced performance.
CDTVBPKL3/80-90 (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
CDTMKL3/80 (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 the Kit. At the beginning of R&D on this transmission, we thought this area needed strengthening. However, in all the units that we've rebuilt, we've NEVER seen one broken, so we deemed it unnecessary. Also, we do not include a billet pump rotor because, unlike the 4L60E, the factory pump rotor has proven itself reliable (we have never seen one broken).
We recommend the Billet Reinforced Output Carrier for vehicles producing over 750 RWHP, Nitrous, or Heavy Vehicles (including trucks, SUVs, and CTS-Vs). 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). We highly recommend that you purchase the billet-reinforced output carrier. We offer a 6L80 Level 4 Kit that includes this part.
