In GM 4L60-E, 4L65-E and 4L70-E units, it is common for the plastic Forward accumulator piston to wear or crack and older aluminum piston bores to wear from repeated reciprocation. This causes a loss of fluid, resulting in delayed engagement, slips, burnt clutches and/or bands. Sonnax aluminum Forward accumulator piston 74927-AP eliminates the cracking problem and restores hydraulic integrity at the pin bore. The drop-in Zip Valve™ part installs quickly and easily.
Learn More About Zip Valve™ Drop-In Repairs

More From This Category

Sonnax B/Direct Clutch Bushing, Ford, ZF6Hp26/28, 6R80, 34mm

Sonnax B/Direct Clutch Bushing, Ford, ZF6Hp26/28, 6R80, 34mm

$97.59

MANLEY Connecting Rod Pin Bushing, Bronze, 1.424 in. OD, 1.299 in. ID, 1.167 in. Length, Each

MANLEY Connecting Rod Pin Bushing, Bronze, 1.424 in. OD, 1.299 in. ID, 1.167 in. Length, Each

$22.80

Sonnax Secondary Pulley Bearing, JF011E (Re0F10A), Each

Sonnax Secondary Pulley Bearing, JF011E (Re0F10A), Each

$199.77

Sonnax Bondable Yoke, 1310 X 2.00in. Carbon, Each

Sonnax Bondable Yoke, 1310 X 2.00in. Carbon, Each

$256.53