Chevrolet Silverado / GMC Sierra. Manual - part 993
Fig. 508: Output Nut (4WD)
Courtesy of GENERAL MOTORS CORP.
3. Ensure the park pawl is engaged.
4. Install the J 43769 (1) onto the output shaft retaining nut, 4WD (2). See Special Tools.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
5. Using the J 43769 (1), install a new output shaft retaining nut, 4WD (2) onto the output
shaft (3). See Special Tools.
Tighten: Tighten the nut to 61 N.m (45 lb ft).
Fig. 509: Park/Neutral Position Switch Gear Positions
Courtesy of GENERAL MOTORS CORP.
NOTE:
Refer to Component Fastener Tightening Notice .
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
6. Using a wrench on the manual shift shaft flats (1), rotate the shaft to the fullest clockwise
position.
7. Rotate the manual shift shaft counterclockwise 2 detent positions.
8. Make sure the park pawl is disengaged.
TRANSMISSION VENT INSTALLATION
IMPORTANT: The Neutral (N) position of the manual shift shaft is 2 detent
positions counterclockwise from the fullest clockwise
position.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado
Fig. 510: View Of Transmission Case Vent
Courtesy of GENERAL MOTORS CORP.
1. Install the vent (1).
2. Gently tap the vent until seated.
TURBINE SPEED SENSOR INSTALLATION
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &
Silverado