Stellar Automotive Group 1000/2000/2400 C1 Bonded Balance Piston fits Allison

Stellar Automotive Group 1000/2000/2400 C1 Clutch Bonded Balance Piston – Compatible for Allison 2000-Up

Stop harsh forward engagement, slipping, and burnt C1 clutches with this precision bonded balance piston from Stellar Automotive Group.

This direct-replacement piston is the critical balance component inside the C1 (forward) clutch drum on all Allison 1000, 2000, and 2400 series transmissions from 2000 onward. The factory piston commonly cracks or loses its bond under extreme heat and torque, causing internal leakage that slams the C1 pack on apply — leading to rapid friction failure and delayed or no forward drive. This upgraded molded piston with permanently bonded rubber seal restores perfect clutch timing, smooth engagement, and reliable performance even in severe-duty towing applications.

Perfect fit for popular Allison-equipped models including:

• Chevrolet/GMC Silverado/Sierra 2500HD/3500HD (Duramax)
• Dodge/Ram 3500 (Cummins with Allison swap)
• Medium-duty trucks, motorhomes, and commercial applications

Symptoms of a failing C1 balance piston:

• Hard bang or delayed forward engagement
• Forward clutch slip or flare on takeoff
• Burnt C1 frictions on teardown
• Low C1 pressure during testing

Don’t let a cracked piston destroy your C1 pack — install the Stellar Automotive Group bonded balance piston and rebuild with confidence.

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

Add this essential Allison 1000/2000/2400 component to your cart today and shift smooth under any load!