Stellar Automotive Group 4L40E/5L40E Intermediate Clutch Molded Piston fits GM

Stellar Automotive Group 4L40E/5L40E Intermediate Clutch Molded Piston – Compatible for GM & BMW 2000-2010

Stop slipping in 2nd-3rd gears, delayed upshifts, and burnt intermediate clutches with this upgraded molded intermediate clutch piston from Stellar Automotive Group.

This direct-replacement piston is the critical apply component for the intermediate clutch pack in all 4L40E and 5L40E transmissions. The factory piston commonly cracks or loses its bond under heat and mileage, causing internal leakage that weakens intermediate apply — leading to flare on upshifts, slipping under load, and rapid clutch failure. This molded piston with permanently bonded rubber seal restores full line pressure, delivers crisp 2nd-to-3rd transitions, and protects your intermediate clutch pack for reliable daily driving or light towing.

Perfect fit for popular models including:

• Chevrolet Trailblazer, SSR
• BMW 3 Series (E46), 5 Series (E39)
• Cadillac CTS (early), Escalade (select)

Symptoms of a failing intermediate clutch piston:

• Flare or slip on 2-3 upshift
• Delayed engagement in intermediate gear
• Harsh shifts when clutches finally grab
• Burnt intermediate frictions on teardown

Don’t let a $50 piston destroy a $500 clutch pack — install the Stellar Automotive Group molded intermediate piston and shift strong through every gear.

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

Add this essential 4L40E/5L40E rebuild part to your cart today and enjoy crisp, reliable shifts!