Chevrolet Silverado / GMC Sierra. Manual — part 940
Fig. 334: Locating Spherical Pin At Transmission Case
Courtesy of GENERAL MOTORS CORP.
12. Install the spherical pin (1) into the transmission case.
13. Lightly tap the spherical pin (1) into position until the head of the pin (1) is seated against
the transmission case.
EMBLEM/NAMEPLATE REPLACEMENT
NOTE:
DO NOT mar the transmission case surface around the
spherical pin when removing or installing the spherical pin. An
unmarred surface is required to maintain the seal between the
control valve assembly and the transmission case.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
Fig. 335: Locating Nameplate On Transmission Case
Courtesy of GENERAL MOTORS CORP.
1. Using a 0.004 mm (3/16 in) drill bit, drill through the rivet fastening the nameplate to the
IMPORTANT: When replacing a nameplate, keep the original nameplate.
Stamp the information from the original nameplate onto the
replacement nameplate.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
transmission case.
2. Remove the nameplate and rivet.
3. Using a new rivet (1) and a pop rivet gun, rivet the new nameplate (2) onto the transmission
case.
3RD, 5TH AND REVERSE CLUTCH PLATE INSPECTION
Fig. 336: Measuring Clutch Oil Groove Depth & Fiber Plate Thickness
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
Courtesy of GENERAL MOTORS CORP.
1. Measure the thickness of each 3rd, 5th, and reverse clutch fiber plate (1) at dimension A.
Specification: The 3rd, 5th, and reverse clutch fiber plate minimum thickness is 2.375 mm
(0.093 in).
2. Measure the oil groove depth of each 3rd, 5th, and reverse clutch fiber plate at dimension B.
Specification: The 3rd, 5th, and reverse clutch fiber plate minimum groove depth is 0.200
mm (0.0079 in).
Fig. 337: Measuring Cone Of Clutch Fiber Plate
Courtesy of GENERAL MOTORS CORP.
3. Measure the cone of each 3rd, 5th, and reverse clutch fiber plate (1).
Specification: The 3rd, 5th, and reverse clutch fiber plate maximum cone is 0.225 mm
(0.0089 in).
IMPORTANT: Make the following measurements at 3 or more locations.
Replace any parts not meeting specifications.
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
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