A common condition in Ford 4L60-E transmissions is a burned Forward clutch or delayed engagement. A worn Forward accumulator piston pin bore is frequently the source of this condition. The aluminum piston continuously oscillates on a hardened steel pin, which can cause wear resulting in Forward clutch oil exhausting. This oil loss reduces accumulator action and decreases the Forward clutch apply pressure. Sonnax oversized accumulator pin77754-01Keliminates this problem.

• Oversized accumulator pin restores the proper fit between the piston bore and pin
• Pin is made from hardened steel and fits more securely in the valve body bore, preventing oil from exhausting through the valve body
• Allows the rebuilder to re-use the original piston while providing a more durable, less expensive solution
• Starter kit 77754-02K contains 10 pins plus one reamer