Symptoms:
- Soft slide shifts
- 3-4 Clutch burned
- Reduced band life
Cause:
MTV boost loss and insufficient line rise.Correction:
Sonnax drop-in TV boost valve kit prevents oil loss between the outside diameter of the TV sleeve and the pump body.200-4R,4L60
TV Boost Valve Kit
Part No.77917-01K
.423" Dia., O-Ring Style
View Instructions 乐动ldsportsA common problem in GM 200-4R and 4L60 transmissions is burned bands and/or 3-4 clutches. This failure can be reduced by eliminating throttle boost oil leakage. The Sonnax TV boost valve kits 77917-01K (.423" dia.),77917-471(.471" dia.) and77917-500(500" dia.) eliminate these problems for a variety of applications. For minimal line pressure in V8 applications, use Sonnax TV boost valve kit 77917-01K.
- 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
- Drop-in Zip Valve™ parts install quickly and easily
| Sonnax Part No. | Sleeve Dia. | Performance Application |
|---|---|---|
| 77917-01K | .423" dia. | Minimum line pressure for V8 applications |
| 77917-471 | .471" dia. | Higher line pressure for towing and off-road |
| 77917-500 | .500" dia | Maximum line pressure & shift feel for high performance applications |
- Valve
- Sleeve.423" Dia.
- O-Rings (2)
