4L30E 3-4 Accumulator Piston Cover fits GM

4L30E 3-4 Accumulator Piston Cover – Compatible for GM 1990-2005

Eliminate harsh 3-4 shifts, flare, and premature 3-4 clutch wear with this precision-machined 3-4 accumulator piston cover from Stellar Automotive Group.

This direct-replacement cover secures the 3-4 accumulator piston and seals the assembly perfectly. The factory cover often warps, cracks, or loses seal integrity under heat and mileage, causing inconsistent cushioning — leading to banging shifts, clutch slip, and rapid friction failure. This upgraded steel cover restores proper accumulator function, delivers smooth and firm 3-4 transitions, and protects your 3-4 clutch pack for reliable daily driving.

Perfect fit for popular models including:

• Chevrolet Blazer, S10
• GMC Jimmy, Sonoma
• Isuzu Hombre

Symptoms of a failing 3-4 accumulator cover:

• Harsh bang or flare on 3-4 upshift
• Delayed then hard 3rd gear engagement
• Burnt 3-4 frictions on teardown
• Low accumulator pressure during testing

Don’t let a warped cover cost you a clutch pack — install the Stellar Automotive Group 3-4 accumulator piston cover and shift smooth again.

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

Add this essential 4L30E rebuild part to your cart today and enjoy crisp, reliable shifts!