Chevrolet Silverado / GMC Sierra. Service manual — part 867

seal is installed correctly when the shoulder of J 43782 squarely contacts the outer surface
of the rear cover. See Special Tools.

3. Install the yoke assembly onto the transmission. Refer to Output Flange/Yoke

Replacement.

MANUAL SHIFT SHAFT SEAL REPLACEMENT

Tools Required

J 43911 Manual Shift Shaft Seal Remover

J 43909 Manual Shift Shaft Seal Installer

Removal Procedure

Fig. 95: Sliding Seal Remover Tool Over Selector Shaft

2008 Chevrolet Silverado 1500

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

Silverado

Courtesy of GENERAL MOTORS CORP.

1. Be sure that the jackscrew for J 43911 is backed off and will not interfere with installation

of the removal tool. Slide the seal remover tool over the manual shift shaft (2) with the
threaded end of the tool towards the seal.

2. Rotate the removal tool so that the threads on the end of the tool engage the steel shell (1) of

the seal. Use a wrench to be sure that the removal tool is firmly attached to the seal shell.

3. Rotate the jackscrew in the clockwise direction to remove the seal from the bore. Discard

the seal that was removed.

Installation Procedure

Fig. 96: Sliding New Selector Shaft Seal Over Selector Shaft
Courtesy of GENERAL MOTORS CORP.

1. Carefully slide a new manual shift shaft seal (1) over the manual shift shaft (2) with the wide

face of the steel case facing outward. Position so that the seal is starting to enter the seal

2008 Chevrolet Silverado 1500

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

Silverado

bore.

2. Obtain J 43909 and remove the inner sleeve so that the tool will slide over the manual shift

shaft.

3. Slide the J 43909 into position so that the end of the tool contacts the seal being installed.

Use a mallet to strike the J 43909 and drive the new seal into the seal bore until the seal is
seated at the bottom of the bore.

WIRING HARNESS REPLACEMENT

Tools Required

J 44247 Internal Wiring Harness Installer. See Special Tools.

J 44257 Main Wiring Harness Connector Remover

Removal Procedure

2008 Chevrolet Silverado 1500

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

Silverado

Fig. 97: Transmission Rear Electrical Connector
Courtesy of GENERAL MOTORS CORP.

1. Remove the oil pan and transmission internal oil filter. Refer to Oil Pan Replacement.

2. Disconnect the external wiring harness from the main transmission connector. Use J 44257 ,

if connector is not easily accessible.

CAUTION: Refer to BATTERY DISCONNECT CAUTION .

2008 Chevrolet Silverado 1500

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

Silverado