For 1990-2009 cars

# 1-2 Accumulator Piston and Outer Spring Replacement

Subject: | 1-2 Accumulator Piston and Outer Spring Replacement

Models: | 1982-96 Buick Roadmaster

| 1982-96 Cadillac Brougham, Fleetwood, DeVille

| 1982-86 Chevrolet Caprice

| 1982-99 Chevrolet Camaro, Corvette

| 1982-99 Pontiac Firebird

| with HYDRA-MATIC 4L60, 4L60-E Transmission (RPOs MD8, M30)

| 1982-99 Chevrolet and GMC C/K, M/L, S/T, G Models

| 1991-99 Oldsmobile Bravada

| with HYDRA-MATIC 4L60, 4L60-E Transmission (RPOs MD8, M30)

### Condition

Transmission built from 1982 through 1999 were built with one of two styles of 1-2 accumulator pistons and outer springs.

### Correction

Notice: Failure to follow these instructions may result in transmission distress.

Important: The 1-2 accumulator pistons and outer springs are not interchangeable.

In order to replace the 1-2 accumulator piston and outer spring, remove the 1-2 accumulator assembly. Inspect the interior of the assembly for the presence of either and aluminum or composite (plastic) 1-2 accumulator piston.

#### Design 1

1-2 accumulator assemblies with an aluminum piston and a round wire outer spring, use service package P/N 24204495 (1982-1993) or P/N 24204496 (1994-1997).

#### Design 2

1-2 accumulator assemblies with a composite (plastic) piston and an ovate wire outer spring, started May 11, 1998 (Julian Date 131), use service package P/N 24214343 (1998-1999)

### Parts Information

Parts are currently available from GMSPO.