4L60E 4L65E SMALL AND LARGE 0.238″ 0.310″ PIN DUAL SEAL ACCUMULATOR PISTON SET

Description

You are buying a dual seal accumulator piston SET for 4L60E and 4L65E transmissions.

• This set includes two accumulator pistons – enough for one transmission
• MOST 4L60E’s (mid 1994 and later) and all 4L65E’s require one small (0.238″) and one of the large (0.310″) pin accumulator piston
• This accumulator piston uses two seals, unlike the OE piston, to eliminate pin wear
• The stock pistons can accumulate pin wear in as little as 25k miles, this causes a hydraulic circuit cross leak and a loss of functionality
• In addition, we have seen the pinless versions cock in the bore and get stuck
• This one solves the problem by providing two seals and uses the pin to stabilize the piston in the bore
• The seals are included

ALL 700R4s, 4L60’s and very few early 4L60E’s require two accumulator pistons with the large (0.310″) diameter pin