Sonnax 76948-29K Overdrive Servo Regulator Kit for 4R70W 4R75W Transmissions

The Sonnax 76948-29K overdrive servo regulator kit maintains critical tolerances that re-establish the hydraulic integrity of the circuit in Ford 4R70W, 4R70E, 4R75W, and 4R75E transmissions (2001-Up). This precision-engineered kit addresses common transmission issues including burned overdrive bands, loss of 4th gear, and 4-3-neutral shift patterns.

Key Features:

• Hardcoat anodized aluminum valve and high-grade aluminum sleeve resist premature wear
• Restores proper overdrive servo oil regulation
• Replaces worn OE components that cause hydraulic leakage
• Designed for AODE, 4R70W, 4R70E, 4R75W, and 4R75E transmissions
• Fits 2001 and newer Ford applications

Wear at the inside diameter of the overdrive servo regulator boost valve sleeve, caused by constant oscillation, allows valuable overdrive oil to leak and prevents proper regulation of the overdrive servo. This Sonnax kit eliminates these issues by replacing worn components with high-quality, wear-resistant parts that restore proper hydraulic function and transmission performance.