Stellar Automotive Group 4L40E/5L40E 2nd Clutch Molded Piston fits BMW 2WD

Stellar Automotive Group 4L40E/5L40E 2nd Clutch Molded Piston (2WD BMW) – Compatible for 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 (2WD-specific).

This direct-replacement piston is the critical apply component for the 2nd clutch pack in RWD/2WD versions of 4L40E and 5L40E transmissions found in BMW models. 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 BMW performance.

Perfect fit for popular 2WD BMW models including:

• BMW 3 Series (E46/E90)
• BMW 5 Series (E39/E60)
• BMW Z4 (E85)

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 and shift strong through every gear.

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

Add this essential 4L40E/5L40E 2WD BMW rebuild part to your cart today and enjoy crisp, reliable shifts!