Chevrolet Silverado / GMC Sierra. Manual - part 929
Fig. 300: Identifying Fiber Clutch Plate Measurement Locations
Courtesy of GENERAL MOTORS CORP.
IMPORTANT:
Measure as described below at a minimum of 3
locations.
Replace any 4-5-6 clutch fiber plate that does not meet
specifications.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
1. Measure the thickness of each 4-5-6 clutch fiber plate (1) at dimension A.
Specification: The 4-5-6 clutch fiber plate minimum thickness is 2.375 mm (0.0935 in).
2. Measure the 4-5-6 clutch fiber plate oil groove depth of each plate at dimension B.
Specification: The 4-5-6 clutch fiber plate minimum groove depth is 0.200 mm (0.0079
in).
STEEL 4-5-6 CLUTCH PLATE INSPECTION
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
Fig. 301: Measuring Thickness Of 4-5 Clutch Steel Plate
Courtesy of GENERAL MOTORS CORP.
IMPORTANT:
Measure as described below at a minimum of 3
locations.
Replace any 4-5-6 clutch steel plate that does not meet
specifications.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
1. Measure the thickness of each 4-5-6 clutch steel plate (1) at dimension A.
Specification: The 4-5-6 clutch steel plate minimum thickness is 2.135 mm (0.0841 in).
Fig. 302: Measuring Cone Of Clutch Steel Plate
Courtesy of GENERAL MOTORS CORP.
2. Measure the cone of each 4-5-6 clutch steel plate (1) at dimension A.
Specification: The 4-5-6 clutch steel plate maximum cone is 0.240 mm (0.0094 in).
1-2-3-4-5-6 CLUTCH PISTON HOUSING ASSEMBLE
Tools Required
J 24204-2 Bar and Stud Assembly. See Special Tools.
J 36850 Transjel® Lubricant. See Special Tools.
J 44525 Clutch Backing Plate Selector. See Special Tools.
J-47339-1 Piston Return Spring Compressor. See Special Tools.
J-47339-2 Seal Area Protector. See Special Tools.
Assemble
IMPORTANT: Check the steel plates for coning on a level surface.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado