2-3-4-6-8 Clutch Backing Plate Retaining Ring Measurement (8L45)

Special Tools

• DT-50900  Clutch Travel Support Fixture
• DT-50902  Adjustable Clutch Spring Compressor
• DT-50903  Clutch Travel Load Gauge
• DT-50905  Clutch Air Travel Adapter
• GE-8001  Dial Indicator Set

Equivalent regional tools: Special Tools

1. 2-3-4-6-8 and 4-5-6-7-8-Reverse Clutch - Assemble - 2-3-4-6-8 and 4-5-6-7-8 Reverse Clutch Assemble (8L45) 
2. Fig 1: 2-3-4-6-8 Clutch Backing Plate Retaining Ring Measurement

   Courtesy of GENERAL MOTORS COMPANY

   Assemble the tools as shown and clamp the DT-50900  Clutch Travel Support Fixture (1) to the bench.

3. Apply 50 pounds of pressure to the DT-50903  Clutch Travel Load Gauge (2) by turning the screw on the DT-50900  Clutch Travel Support Fixture (1) clockwise.
4. Zero out the GE-8001  Dial Indicator Set (4).
5. Remove the pressure on the DT-50903  Clutch Travel Load Gauge (2) by turning the screw on the DT-50900  Clutch Travel Support Fixture (1) 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 hole on the DT-50905  Clutch Air Travel Adapter (3) and simultaneously adjust the screw on the DT-50900  Clutch Travel Support Fixture (1) to apply 50 pounds of pressure to the DT-50903  Clutch Travel Load Gauge (2).
7. Observe the dial indicator measurement. Refer to Clutch Backing Plate Retaining Ring Specifications (8L45) to determine the correct 2-3-4-6-8 Clutch Backing Plate Retaining Ring (5).