- 3-4 Clutch burned
- Reduced band life
- Soft slide shifts
MTV boost loss and insufficient line rise.
These replacement assemblies prevent oil loss between the outside diameter of the TV sleeve and the pump body.
TV Boost Valve Kit
- O-Rings (2)
.500" Dia., O-ring style
A common problem in GM 4L60 transmissions is burnt bands and/or 3-4 clutches. This failure can be reduced by eliminating throttle boost oil leakage. Sonnax TV boost valve kit 77917-500 will eliminate these problems for a variety of applications, and will boost pressure higher than TV boost valve kit 77917-471 due to the increased .500" valve spool ratio.
- Returns higher pressure than OE-ratio valve
- Boost valve and sleeve are 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