Transmission Parts Ford 4R75W 4R70W AODE 4R70E 4R75E Valve Body Valve / Sleeve

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Symptoms:

Low Reverse boost
Delayed Reverse
Reverse slip
No Reverse
Low line rise in Reverse
Burnt Reverse clutch

Cause:

Worn OE boost sleeve allows critical pressure loss that prevents proper Reverse operation.

Correction:

Stop boost leakage and renew Reverse performance by installing Sonnax drop-in boost valve kit.

4R70E, 4R70W, 4R75E, 4R75W, AODE

Boost Valve Kit
Part No. 76948-02K

Fits '91-later units.

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Ford vehicles with 4R70E, 4R70W, 4R75E, 4R75W and AODE transmissions may exhibit insufficient line rise in Reverse, delayed or slipping Reverse, and/or a burnt Reverse clutch. Continuous oscillation of the OE boost valve within the boost sleeve causes premature wear, creating a path for boost pressure to exhaust and causing these concerns. Installing Sonnax boost valve kit 76948-02K eliminates pressure loss, restoring proper line rise and robust Reverse action.