3-5-R clutches in Ford 6F50, 6F55 and GM first generation 6T70 and 6T75 units are applied in 3rd, 5th and Reverse Gears in conjunction with other clutch packs. As the 3-5-R clutch regulator valve oscillates and strokes over time, bore deterioration results, which prevents proper hydraulic control of the 3-5-R clutch pack. This can cause flares, slipping, erratic clutch apply timing, ratio codes, bind-ups and burnt 3-5-R clutches. Reconditioning the bore and installing Sonnax oversized 3-5-R clutch regulator valve kit 124740-26K restores normal shift operation by re-establishing the hydraulic integrity of the 3-5-R circuit.

Replaces 1.35 ratio OE valve
Annular grooves help center valve in bore to reduce future side-load wear
Hardcoat anodized aluminum valve combats premature wear

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