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Type: Pump component

Manufacturer Warranty: Yes

Part Brand: Sonnax

Fitment Type: Direct Replacement

Items Included: Boost Valve and Sleeve with O-rings

Manufacturer Part Number: 77917-471

Universal Fitment: Yes

Vintage Part: No

Performance Part: Yes

200-4R, 4L60, 700R4

TV Boost Valve Kit
Part No. 77917-471

.471" Dia., O-Ring Style

A 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.) and 77917-500 (500" dia.) eliminate these problems for a variety of applications. For higher line pressure for towing and off-road, use Sonnax TV boost valve kit 77917-471.

  • 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
  • Valve
  • Sleeve .471" Dia.
  • O-Rings (2)

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