Description
# 74927-AP Sonnax, 4L60E, 4L65E, 4L70E Forward Accumulator Piston, OE Part # 8686017 or 24200126
In GM 4L60E, 4L65E and 4L70E 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.
