| 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 |
| 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.
