Stellar Automotive Group 4L80E Piston 3rd Clutch Accum fits GM 91-Up

Stellar Automotive Group 4L80E Piston 3rd Clutch Accumulator – Compatible for GM 1991-Up

Eliminate that brutal 2-3 “clunk” and save your 3rd clutch pack with this precision molded piston from Stellar Automotive Group.

This is the critical 3rd clutch accumulator balance piston (commonly called the piston) used in every 4L80E and 4L85E from 1991 onward. The factory piston cracks or the lip seal hardens, causing loss of cushion pressure and slamming the 3rd clutch on every 2-3 shift — leading to burnt frictions and broken shafts. Installing this upgraded molded piston with permanently bonded rubber seal during your rebuild restores the factory-soft 2-3 upshift and dramatically extends 3rd clutch life.

Perfect fit for all 1991-Up models including:

• Chevrolet/GMC Silverado, Sierra, Suburban, Tahoe, Yukon
• Cadillac Escalade, Hummer H1
• All 4L80E & 4L85E applications

Symptoms of a failing piston:

• Hard bang or clunk on 2-3 upshift
• Delayed then harsh 3rd gear engagement
• Burnt or glazed 3rd clutch frictions
• Broken intermediate sprag from shock load

Don’t let a $40 part destroy your $600 clutch pack — drop in the Stellar Automotive Group molded piston and shift smooth again.

Note: All parts are distributed, not designed or manufactured, by Stellar Automotive Group.

Add this must-have 4L80E upgrade to your cart today and feel the difference on every 2-3 shift!