First Reverse Brake Assembly Installation

Important:  When installing new clutch discs in the 1st - reverse brake, the underdrive brake, the underdrive clutch, the intermediate brake, the forward clutch or the direct clutch assemblies, the new clutch discs MUST be soaked in Dexron® -III Automatic Transmission Fluid GM P/N 12346143 or equivalent, two hours prior to installation. This causes the clutch material on the discs to permeate with fluid which will aid in ease of assembly and prevent clutch overheating on first time engagement.

1. Install the five plates (2) and the five discs (1) in the transaxle case in the following order:
   • Plate
   • Disc
   • Plate
   • Disc
   • Plate
   • Disc
   • Plate
   • Disc
   • Plate
   • Disc
   Fig 1: Identifying 1st - Reverse Brake Disc & Plate Installation Sequence

   Courtesy of GENERAL MOTORS CORP.

   Important:  The 1st - reverse brake flange must be installed with the flat side facing down and the stepped portion facing upwards.

2. Install the 1st - reverse brake flange (2).
   Fig 2: Installing 1st - Reverse Brake Flange

   Courtesy of GENERAL MOTORS CORP.
3. Install the 1st - reverse brake snap ring (1) into the transaxle case (2).
   Fig 3: Installing 1st - Reverse Brake Snap Ring

   Courtesy of GENERAL MOTORS CORP.
4. Measure the 1st - reverse brake assembly clearance using a feeler gage (2).
   • The 1st - reverse brake assembly clearance should fall within 1.06-2.38 mm (0.04170-0.0937 in).
   • The 1st - reverse brake assembly clearance is above 1.06 mm (0.0417-in), inspect the 1st - reverse brake assembly for excessive wear.
   Fig 4: Measuring 1st - Reverse Brake Assembly Clearance Using Feeler Gage

   Courtesy of GENERAL MOTORS CORP.