700R4 200-4R .500 of an Inch Boost Valve with O-Rings Sonnax Number 77917-500.
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 drop-in TV boost valve kit number 77917-500 (500″ dia.) eliminate these problems for a variety of applications.
- 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