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 leaka
Brand: SONNAX, Type: Pump component, Manufacturer Warranty: Yes, Part Brand: Sonnax, Fitment Type: Direct Replacement, Items Included: Boost Valve and
2004R 4L60 700R4 Transmission TV Boost Valve Kit Sonnax 77917-471 .471
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2004R 4L60 700R4 Transmission TV Boost Valve Kit Sonnax 77917-471 .471 : Automotive
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Sonnax 77917-04K TV Boost Valve Kit .500 Dia., Factory-Style Sleeve (No O-Ring)
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2004R 4L60 700R4 Transmission TV Boost Valve Kit Sonnax 77917-471 .471 – Phoenix Transmission Parts