Stellar Automotive Group 4T40E ONE-Way Coast Clutch Piston fits GM 95-05

Stellar Automotive Group 4T40E ONE-Way Coast Clutch Piston – Compatible for GM 1995-2005

Fix the classic “engine races when you let off the gas” issue with this precision ONE-way coast clutch piston from Stellar Automotive Group.

This is the correct ONE-piston (also called the one-way clutch piston or coast clutch return piston) used in every 4T40E and 4T45E. The original piston cracks or the lip seal hardens, causing loss of hydraulic hold-off and letting the one-way clutch freewheel — resulting in no engine braking, high RPM overrun on deceleration, and eventual sprag or coast clutch failure. This upgraded molded piston with permanently bonded rubber seal restores full function instantly.

Perfect fit for 1995-2005 models including:

• Chevrolet Malibu, Cavalier
• Pontiac Grand Am, Sunfire
• Oldsmobile Alero, Cutlass

Symptoms of a bad ONE-piston:

• Engine revs freely when coasting in gear
• No engine braking (especially in lower gears)
• Ratcheting noise from one-way clutch
• Burnt coast clutches or broken sprag on teardown

Drop this ONE-piston in during your next rebuild and get that factory-correct engine braking back — no more runaway revs!

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

Add this critical 4T40E ONE-piston to your cart today and feel the difference on every downshift!