常见问题在福特4 r70e 4 r70w 4 r75e和4 r75W 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 inside diameter of the overdrive servo regulator boost valve sleeve due to constant oscillation. Excess wear allows valuable overdrive oil to leak, preventing the proper regulation of the overdrive servo. Sonnax overdrive servo regulator kit 76948-29K maintains critical tolerances that re-establish the hydraulic integrity of the circuit.

• Hardcoat anodized aluminum valve and high grade aluminum sleeve combat premature wear
• Closely toleranced sleeve improves sealing
• Drop-in Zip Valve™ parts install quickly and easily