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Sonnax 700R4 Boost Valve .500 With O-Rings

Sonnax 700R4 Boost Valve .500 With O-Rings

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SONNAX 700R4 2004R BOOST VALVE .500 WITH 0-RINGS 77917-500


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

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