2004R 4L60 700R4 Transmission TV Boost Valve Kit Sonnax 77917-01K .423"

A common problem in 4L60 transmissions is burned bands and/or 3-4 clutches. This failure can be reduced by eliminating throttle boost oil leakage. T

• Throttle valve boost valve and sleeve are made from made from hardened steel for better wear resistance.
• O-rings on sleeve separate throttle pressure and reverse boost circuits, providing additional protection against cross leaks.
• O-rings prevent loss of oil between the outside diameter of the throttle valve sleeve and pump body.