Chevrolet Silverado / GMC Sierra. Service manual — part 2823

2. Inspect for spun bearings at the front output shaft bearing areas.

3. Inspect the front output internal splines and driven gear splines for damage or excessive

wear.

4. Replace the front output shaft if it is damaged.

5. Inspect the cup plug in the front output shaft for leaking.

6. Replace the cup plug if it is leaking. Refer to Transfer Case Disassemble and Transfer

Case Assemble.

Rear Output Shaft

Fig. 62: View Of Rear Output Shaft, Bearing & Mainshaft Rear Support Bushing
Courtesy of GENERAL MOTORS CORP.

1. Clean the rear output shaft with rear output shaft bearing in cleaning solvent.

2. Air dry and ensure all solvent is removed from the bearing.

3. Inspect the rear output shaft bearing for the following conditions:

Scoring

Pitting

Brinelling

Excessive wear

4. Replace the rear output shaft bearing if it is faulty. Refer to Transfer Case Disassemble

and Transfer Case Assemble.

5. Inspect the mainshaft rear support bushing for the following conditions:

Pitted

Wear

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - BW 4485-NR3 - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Corrosion

6. Replace the mainshaft rear support bushing if any of the above conditions are found. Refer

to Transfer Case Disassemble and Transfer Case Assemble.

7. Inspect the rear output shaft splines for wear or damage.

8. Inspect the rear output shaft bearing area for a spun bearing.

9. Replace the rear output shaft if any of the above conditions are found.

TRANSFER CASE ASSEMBLE

Tools Required

J 3289-20 Holding Fixture

J 8092 Universal Driver

J 22912-B Rear Pinion and Axle Bearing Remover

J 36850 Transjel Lubricant

J 42176 Universal Driver Handle - Non-Threaded. See Special Tools.

J 42738 Seal Installer. See Special Tools.

J 43484 Front Output Shaft Seal Installer. See Special Tools.

J 45380 Transfer Case Rear Bushing Remover and Installer. See Special Tools.

J 45756 Rear Output Shaft Seal Installer. See Special Tools.

J 45757 Mainshaft Support Bushing and Bearing Installer. See Special Tools.

J 45759 Assembly Fixture. See Special Tools.

Assemble

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - BW 4485-NR3 - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Fig. 63: View Of Transfer Case Mounting Stud
Courtesy of GENERAL MOTORS CORP.

1. If removed, install the transfer case mounting studs.

Tighten: Tighten the mounting studs to 10 N.m (89 lb in).

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - BW 4485-NR3 - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Fig. 64: View Of Front Transfer Case Bench Mount
Courtesy of GENERAL MOTORS CORP.

2. Attach the J 45759 to the front transfer case using the adapter studs. See Special Tools. All

of the assembly procedures can be performed with the case mounted to the J 45759 . See
Special Tools.

3. Install the J 45759 (2) into the J 3289-20 (1) and secure with the pivot pin. See Special

Tools.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - BW 4485-NR3 - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado