Stellar Automotive Group 4L40E/5L40E 2nd Clutch Molded Piston fits GM AWD

Stellar Automotive Group 4L40E/5L40E 2nd Clutch Molded Piston (AWD) – Compatible for GM & BMW 2000-2010

Stop slipping in 2nd gear, delayed upshifts, and burnt 2nd clutches with this upgraded molded 2nd clutch piston from Stellar Automotive Group (AWD-specific).

This direct-replacement piston is the critical apply component for the 2nd clutch pack in AWD versions of 4L40E and 5L40E transmissions. The factory piston commonly cracks or loses its bond under heat and mileage, causing internal leakage that weakens 2nd gear apply — leading to flare on 1-2 or 2-3 upshifts, slipping under load, and rapid clutch failure. This molded piston with permanently bonded rubber seal restores full line pressure, delivers crisp 1st-to-3rd transitions, and protects your 2nd clutch pack for reliable AWD performance.

Perfect fit for popular AWD models including:

• Chevrolet Trailblazer EXT (AWD)
• BMW X3 (E83 AWD), 3 Series (AWD variants)
• Cadillac CTS (early AWD)

Symptoms of a failing 2nd clutch piston:

• Flare or slip on 1-2 or 2-3 upshift
• Delayed engagement in 2nd gear
• Harsh shifts when clutches finally grab
• Burnt 2nd frictions on teardown

Don’t let a $50 piston destroy a $500 clutch pack — install the Stellar Automotive Group molded 2nd clutch piston (AWD) and shift strong through every gear.

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

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