Reaction Sun Gear and Drum Assemble

Fig 1: Locating Inspection Areas On Reaction Sun Gear and Drum

GM10619

Courtesy of GENERAL MOTORS CORP.

Inspect the reaction sun gear and drum assembly (678) for the following:
- Worn or scored bushings
- Damaged reaction sun gear teeth
- The band apply area of the drum for discoloration or wear
- The welds connecting the sun gear to the drum for voids or cracks
- A worn or damaged 1-2 support outer race

Fig 2: Installing Reaction Sun Gear And Drum Assembly

GM893331

Courtesy of GENERAL MOTORS CORP.

Install the reaction sun gear and drum assembly (678) into the case.
Check that the lugs engage with the 1-2 support roller clutch inner race.