Hummer H3. Manual — part 1681

Fig. 93: Shift Cam And Shaft Assembly
Courtesy of GENERAL MOTORS CORP.

1. Inspect the shift cam surfaces for the following conditions:

Roughness

Grooves

Excessive wear

2. Inspect the shift cam shaft for the following conditions:

Encoder motor drive end excessively worn

Straightness

3. Inspect the spring for being weak or the tabs bent.

4. Replace any of the above components if they are found to be faulty.

TRANSFER CASE ASSEMBLE

Tools Required

IMPORTANT: Only disassemble the shift cam and shaft assembly if

replacing a faulty component. The tip on the end of the shift
cam shaft is used for assembly. If the tip is broken off, the
shaft can still be used, but may cause problems aligning with
the rear case half during the assembly procedure.

2007 Hummer H3

2007 TRANSMISSION Transfer Case - BW 4493/4494 - H3

DT-47847 Front Output Shaft Seal Installer. See Special Tools.

DT-47946 Bearing Installer. See Special Tools.

J 3289-20 Holding Fixture

J 8614-01 Flange and Pulley Holding Tool

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 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.

Assembly Procedure

2007 Hummer H3

2007 TRANSMISSION Transfer Case - BW 4493/4494 - H3

Fig. 94: Transfer Case Mounting Studs
Courtesy of GENERAL MOTORS CORP.

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

NOTE:

Refer to Fastener Notice .

2007 Hummer H3

2007 TRANSMISSION Transfer Case - BW 4493/4494 - H3

Tighten: Tighten the adapter studs to 14 N.m (10 lb ft).

Fig. 95: J 45759 And J 3289-20 Mounted On Workbench
Courtesy of GENERAL MOTORS CORP.

2. Using the adapter studs, attach the J 45759 to the front transfer case. 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.

2007 Hummer H3

2007 TRANSMISSION Transfer Case - BW 4493/4494 - H3