Chevrolet Silverado / GMC Sierra. Manual — part 927

1. Measure the thickness of each 1-2-3-4 clutch fiber plate (1) at dimension A.

Specification: The 1-2-3-4 clutch friction plate minimum thickness is 2.375 mm (0.093 in).

2. Measure the oil groove depth of each plate at dimension B.

Specification: The oil groove minimum depth is 0.200 mm (0.0079 in).

3. Measure the cone of each plate (1) at dimension A.

Friction Plate Cone: The fiber plate maximum cone is 0.255 mm (0.010 in).

1-2-3-4 CLUTCH STEEL PLATE INSPECTION

IMPORTANT: Check the plates for coning on a level surface.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Fig. 294: Inspecting Thickness Of 1-2-3-4 Steel Clutch Plate
Courtesy of GENERAL MOTORS CORP.

IMPORTANT:

Measure as described below at a minimum of 3
locations.

Replace any 1-2-3-4 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 1-2-3-4 clutch steel plate (1) at dimension A.

Specification: The 1-2-3-4 clutch steel plate minimum thickness is 2.135 mm (0.084 in).

Fig. 295: Checking Cone On Steel Clutch Plate
Courtesy of GENERAL MOTORS CORP.

2. Measure the cone of each plate (1) at dimension A.

Specification: The 1-2-3-4 clutch steel plate maximum cone is 0.200 mm (0.0079 in).

1-2-3-4 CLUTCH BACKING PLATE INSPECTION

IMPORTANT: Check the plates for coning on a level surface.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado