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 - 03 - k
.471" Dia., Factory-Style Sleeve
View Instructions Find a DistributorA 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. Sonnax TV boost valve kits77917-02K(.423" dia.), 77917-03K (.471" dia.) and77917-04K(.500" dia.) eliminate these problems in a variety of applications. For V8 applications and higher line pressure for towing and off-road, use Sonnax TV boost valve kit 77917-03K.
- Throttle valve boost valve and sleeve are manufactured from hardened steel for better wear resistance
- Kits available in three sizes for .423", .471" and .500" diameters for a variety of applications
- Drop-in Zip Valve™ parts install quickly and easily
| Sonnax Part No. | Sleeve Dia. | Performance Applications |
|---|---|---|
| 77917-02K | .423" dia. | Minimum line pressure for V6 applications and smaller vehicles |
| 77917 - 03 - k | .471" dia. | Higher line pressure for towing and off-road |
| 77917-04K | .500" dia. | Maximum line pressure and shift feel for high performance applications |
- Valve
- Sleeve
