November 06, 2014
2-6 Clutches in Ford 6F50, 6F55 and GM first generation 6T70 and 6T75 units are applied in second and sixth gears in conjunction with other clutch packs. As the 2-6 clutch regulator valve oscillates and strokes over time, bore deterioration results, which prevents proper hydraulic control of the 2-6 clutches. This can cause flares, slipping, erratic clutch apply timing, ratio codes, and burnt 2-6 clutches. Reconditioning the bore and installing Sonnax oversized 2-6 clutch regulator valve kit 124740-17K restores normal shift operation and clutch control by re-establishing the hydraulic integrity of the 2-6 circuit.
Proper operation of 2-6 regulator valve depends on correct AFL pressure being supplied to pressure control solenoid. If problems are found with AFL pressure, Sonnax offers oversized AFL valve 124740-01.
Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.
Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.