1-2-3-4-5 Reverse Clutch Backing Plate Retaining Ring Measurement

Special Tools

• DT-48056  Spring Compressor Bridge
• DT-50902  Adjustable Clutch Spring Compressor
• DT-50903  Clutch Travel Load Gauge
• DT-51328  Clutch Compressor and Air Travel Check Rod Extension
• GE-8001  Dial Indicator Set

Equivalent regional tools: Special Tools

1. Install the case extension assembly. Case Extension Assembly Installation 
2. Install the 1-2-3-4-5 reverse clutch plate assembly. Reaction Internal Gear and 1-2-3-4-5 Reverse Hub and 1-2-3-4-5 Reverse Clutch Plate Assembly Installation 

3. Courtesy of GENERAL MOTORS COMPANY

   Assemble the tools as shown and apply 80 pounds of pressure to the load gauge by turning the screw on the DT-48056  Spring Compressor Bridge clockwise.

4. Zero out the dial indicator.
5. Remove the pressure on the load gauge by turning the screw on the DT-48056  Spring Compressor Bridge one full turn counterclockwise.
CAUTION:

Regulate the air pressure to 345 kPa (50 psi) maximum. High pressure could cause the piston to over travel and damage the piston seals.

6. Apply 345 kPa (50 psi) of compressed air to the indicated case passage and simultaneously adjust the screw on the DT-48056  Spring Compressor Bridge to apply 80 pounds of pressure to the load gauge.
7. Observe the dial indicator measurement. Refer to Clutch Backing Plate Retaining Ring Specifications (8L90) , or Clutch Backing Plate Retaining Ring Specifications (8L45) to determine the correct 1-2-3-4-5 reverse clutch backing plate retaining ring.