Common problems in Ford 4R70E, 4R70W, 4R75E and 4R75W transmissions include a burned overdrive band, loss of 4th Gear, and/or a 4-3-Neutral shift pattern. These problems can be caused by wear at the innermost diameter of the overdrive servo regulator valve due to constant oscillation. Excess wear allows valuable regulated overdrive oil to leak, preventing proper regulation of the overdrive servo. Sonnax oversized overdrive servo regulator valve kit 76948-59K maintains critical tolerances that re-establish the hydraulic integrity of the circuit.

Hardcoat anodized aluminum valve combats premature wear and maintains proper clearance at all temperature ranges
Closely toleranced sleeve improves sealing
Salvages valve bodies with wear of the overdrive servo regulator valve bore

More From This Category

Sonnax Supported Servo Pin & Cover Kit, GM, Powerglide, Each

Sonnax Supported Servo Pin & Cover Kit, GM, Powerglide, Each

$184.61

Sonnax Impeller Hub, GM, Comp GM-Rk-685, 688 & Wc, Each

Sonnax Impeller Hub, GM, Comp GM-Rk-685, 688 & Wc, Each

$105.02

Sonnax Thrust Bearing, GM 6T40/6T45, Each

Sonnax Thrust Bearing, GM 6T40/6T45, Each

$25.46

Sonnax Bore Sizing Tool, GM, For 154740-11K, Each

Sonnax Bore Sizing Tool, GM, For 154740-11K, Each

$400.49

Sonnax Flange Yoke, 1480 Series, Each

Sonnax Flange Yoke, 1480 Series, Each

$249.69

Sonnax Impeller Hub, Ford 6F35, Early, Each

Sonnax Impeller Hub, Ford 6F35, Early, Each

$35.55