2-3-4-6-8 Clutch Backing Plate Retaining Ring Measurement (8L90)

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Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
Preliminary Procedure Assemble the 2-3-4-6-8 and 4-5-6-7-8 - Reverse clutch. 2-3-4-6-8 and 4-5-6-7-8 Reverse Clutch Assemble (8L90)
1	2-3-4-6-8 Clutch Backing Plate Procedure Assemble the tools as shown and clamp the DT-50900 fixture to the bench. Apply 60 pounds of pressure to the load gauge by turning the screw on the DT-50900 fixture clockwise. Zero out the dial indicator. Remove the pressure on the load gauge by turning the screw on the DT-50900 fixture 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. Apply 345 kPa (50 psi) of compressed air to the indicated hole on the DT-50905 air adapter and simultaneously adjust the screw on the DT-50900 fixture to apply 60 pounds of pressure to the load gauge. Observe the dial indicator measurement. Refer to Clutch Backing Plate Retaining Ring Specifications (8L90) to determine the correct 2-3-4-6-8 clutch backing plate retaining ring 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

Callout

Component Name

Preliminary Procedure
Assemble the 2-3-4-6-8 and 4-5-6-7-8 - Reverse clutch. 2-3-4-6-8 and 4-5-6-7-8 Reverse Clutch Assemble (8L90)

2-3-4-6-8 Clutch Backing Plate

Procedure

Assemble the tools as shown and clamp the DT-50900 fixture to the bench.
Apply 60 pounds of pressure to the load gauge by turning the screw on the DT-50900 fixture clockwise.
Zero out the dial indicator.
Remove the pressure on the load gauge by turning the screw on the DT-50900 fixture 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.

Apply 345 kPa (50 psi) of compressed air to the indicated hole on the DT-50905 air adapter and simultaneously adjust the screw on the DT-50900 fixture to apply 60 pounds of pressure to the load gauge.
Observe the dial indicator measurement. Refer to Clutch Backing Plate Retaining Ring Specifications (8L90) to determine the correct 2-3-4-6-8 clutch backing plate retaining ring

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