3-4 Clutch Boost Spring
Part No. 77763-01

1988 & later

Package Quantity: 10

The 77763-01 boost springs offer a low cost, direct replacement alternative to the OE springs. Engineered for the application, the 77763-01 boost springs are precision manufactured from high quality spring materials.

• Low-cost direct replacement
• Retainer not included!
• Made from high quality spring material.

4-5-6 Clutch Apply Piston Kit

Part No. 104960-01K

GM 6L80 and 6L90 transmissions often suffer failure of the 4-5-6 clutch assembly due to OE design shortcomings. Insufficient clutch piston-to-plate apply surface area causes clutch plate failure, especially when apply pressures exceed OE specifications. The other problem is flexing and bowing of the backing plate (coning), which is a primary source of clutch failure.