Automatic Transmission Case Extension – ACDelco (8651908)

Automatic Transmission Case Extension is a containment or structural component matched to a specific casting and bolt pattern. Parts that look interchangeable often differ in offset or internal volume.

Replace the Case Extension when the casting is cracked at a mounting point, when a mating flange is no longer flat, or when the original has corroded through. Check the surface it seals against before fitting a replacement.

For this Case Extension the reference is 8651908, in our Transmission Assemblies range. Compare it with the number on the part you are replacing rather than with a photograph.

This is genuine ACDELCO stock, supplied for the Case Extension with the manufacturer number intact so the reference on the box matches the catalogue.