4L80E Piston Forward Center fits GM (91-Up)

Stellar Automotive Group 4L80E Piston Forward Center Sleeve (0.086" Orifice) – Compatible for GM 1991-Up

Eliminate the brutal slam into Drive and save your forward clutches with this exact piston center sleeve from Stellar Automotive Group.

This is the factory-correct piston (balance piston) with the critical 0.086" orifice that cushions and times forward clutch apply. When the original piston cracks or the lip seal fails, it leaks internally and slams the forward clutches on every shift — burning frictions in no time. This molded replacement with permanently bonded rubber seal and perfect 0.086" orifice restores smooth, factory-soft engagement every time you select Drive.

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 bad piston center sleeve:

• Hard bang when shifting into Drive
• Forward clutch chatter or rapid burnout
• Delayed then harsh forward engagement
• Cracked piston or leaking seal on teardown

Don’t let a $40 piston destroy your forward clutch pack — install the Stellar Automotive Group version and shift into Drive like it left the factory.

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

Add this must-have 4L80E piston to your cart today and feel the difference tomorrow!