Description
4R70E / 4R70W / 4R75E / 4R75W / AODE Boost Valve Kit, Sonnax 76948-02K.
Fits ’91-later units.
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.
- Hardcoat anodized aluminum valve combats premature wear
- Sleeve manufactured from highly wear-resistant aluminum
- Drop-in Zip Valve™ parts install quickly and easily
- Valve
- Sleeve
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.
