GM Service Manual Online
For 1990-2009 cars only
Table 1: Transfer Case Holding Fixture Installation
Table 2: Access Hole Plugs, Fill and Drain Plug, Vent, 2/4 Wheel Drive Actuator, and Vehicle Speed Sensor Removal
Table 3: Rear Output Shaft Seal and Shift Detent Plunger Assembly Removal
Table 4: Transfer Case Rear Case Half Removal
Table 5: Oil Pump Suction Pipe Removal
Table 6: Shift Fork Assemblies, Drive Chain, and Rear Output Shaft Assembly Removal
Table 7: Rear Output Shaft Assembly Disassemble
Table 8: Input Shaft and Planetary Assembly Removal
Table 9: Front Output Shaft Assembly Removal

Transfer Case Holding Fixture Installation


Object Number: 1846022  Size: MF

Transfer Case Holding Fixture Installation

Callout

Component Name

1

Transfer Case Nuts

Special Tools

J 45759 Assembly Fixture

For equivalent regional tools, refer to Special Tools.

2

Transfer Case

Special Tools

J 3289-20 Holding Fixture

3

Pivot Pin

Tip

    • Always secure with the pivot pin after rotating.
    • The transfer case can be rotated 360 degrees to facilitate repair.

Access Hole Plugs, Fill and Drain Plug, Vent, 2/4 Wheel Drive Actuator, and Vehicle Speed Sensor Removal


Object Number: 1846023  Size: MF

Access Hole Plugs, Fill and Drain Plug, Vent, 2/4 Wheel Drive Actuator, and Vehicle Speed Sensor Removal

Callout

Component Name

1

Transfer Case Two/Four Wheel Drive Actuator Bolt/Screw

2

Transfer Case Two/Four Wheel Drive Actuator Assembly

3

Transfer Case Oil Fill Plug

4

Transfer Case Oil Drain Plug

5

Transfer Case Vent

Tip
Remove ONLY if the vent pipe is damaged.

6

Vehicle Speed Sensor Assembly

7

Vehicle Speed Sensor O-Ring Seal

8

Transfer Case Access Hole Plugs (Qty: 2)

Rear Output Shaft Seal and Shift Detent Plunger Assembly Removal


Object Number: 1846024  Size: MF

Rear Output Shaft Seal and Shift Detent Plunger Assembly Removal

Callout

Component Name

1

Transfer Case Rear Output Shaft Seal

Caution: Refer to Transfer Case Seal Removal Caution in the Preface section.

2

Transfer Case Shift Detent Plunger Plug

3

Transfer Case Shift Detent Plunger Plug Seal

4

Transfer Case Shift Detent Spring

5

Transfer Case Shift Detent Plunger

Transfer Case Rear Case Half Removal


Object Number: 1846025  Size: MF

Transfer Case Rear Case Half Removal

Callout

Component Name

1

Transfer Case Bolts (Qty: 17)

2

Transfer Case Bracket

3

Transfer Case Rear Case Half

Caution: Refer to Machined Surface Damage Caution in the Preface section.

Tip

    • Use opposing pry bars at casting bosses to spread case.
    • Use snap ring pliers to release the transfer case rear output shaft outer retaining ring from the transfer case rear output shaft rear bearing assembly.

4

Transfer Case Two/Four Wheel Drive Actuator Seal

Oil Pump Suction Pipe Removal


Object Number: 1846026  Size: MF

Oil Pump Suction Pipe Removal

Callout

Component Name

1

Transfer Case Shift Fork Spring

2

Transfer Case Oil Pump Suction Pipe

3

Transfer Case Oil Pump Suction Pipe Seal

Shift Fork Assemblies, Drive Chain, and Rear Output Shaft Assembly Removal


Object Number: 1846027  Size: MF

Shift Fork Assemblies, Drive Chain, and Rear Output Shaft Assembly Removal

Callout

Component Name

1

Transfer Case Rear Output Shaft Assembly

Tip
Mount the assembly into a soft-jaw vice or holding fixture for disassembly.

2

Transfer Case Two/Four Wheel Drive Shift Fork Assembly

3

Transfer Case High/Low Shift Fork Assembly

4

Transfer Case High/Low Clutch

5

Transfer Case Front Output Shaft Drive Chain Assembly

Rear Output Shaft Assembly Disassemble


Object Number: 1846028  Size: MF

Rear Output Shaft Assembly Disassemble

Callout

Component Name

1

Transfer Case Rear Output Shaft Rear Bearing Retaining Ring

2

Transfer Case Rear Output Shaft Rear Bearing Assembly

Tip
Use an arbor press or suitable puller to remove the bearing from the rear output shaft.

3

Transfer Case Rear Output Shaft Rear Bearing Retaining Ring

4

Transfer Case Rear Output Shaft Speed Reluctor Wheel

5

Transfer Case Oil Pump Assembly

6

Transfer Case Front Output Shaft Drive Sprocket Retaining Ring

7

Transfer Case Front Output Shaft Drive Sprocket Spacer - Rear

8

Transfer Case Front Output Shaft Drive Sprocket

9

Transfer Case Front Output Shaft Drive Sprocket Bearing Assembly (Qty: 2)

Tip
Only remove the bearing if faulty. Refer to Drive Chain, Drive Sprocket, and Driven Sprocket Cleaning and Inspection.

10

Transfer Case Two/Four Wheel Drive Synchronizer Blocking - Inner - Ring

11

Transfer Case Two/Four Wheel Drive Synchronizer Blocking - Outer - Ring

12

Transfer Case Two/Four Wheel Drive Synchronizer Assembly

13

Transfer Case Two/Four Wheel Drive Synchronizer Sleeve

14

Transfer Case Two/Four Wheel Drive Synchronizer Insert (Qty: 3)

15

Transfer Case Two/Four Wheel Drive Synchronizer Hub

16

Transfer Case Rear Output Shaft

Input Shaft and Planetary Assembly Removal


Object Number: 1846029  Size: MF

Input Shaft and Planetary Assembly Removal

Callout

Component Name

1

Transfer Case Input Shaft Seal

2

Transfer Case Input Shaft Bearing Outer Retaining Ring

Warning: Do not rotate the transfer case while the retaining ring is removed. Rotating the transfer case while the retaining ring is removed, may cause the input shaft/planetary assembly to fall from the transfer case, resulting in personal injury.

3

Transfer Case Input Shaft/Planetary Assembly

4

Transfer Case High/Low Planetary Carrier Retaining Ring

5

Transfer Case High/Low Locking Plate

6

Transfer Case Planetary Carrier Sun Gear Thrust Washer

7

Transfer Case Input Shaft

8

Transfer Case Input Shaft Pilot Bearing Retaining Ring

9

Transfer Case Input Shaft Pilot Bearing Assembly

Tip
Only remove the bearing if faulty. Refer to Front Output Shaft and Input Shaft Cleaning and Inspection.

10

Transfer Case Planetary Carrier Sun Gear Thrust Washer

11

Transfer Case High/Low Planetary Carrier Assembly

12

Transfer Case Input Shaft Inner Retaining Ring

13

Transfer Case Input Shaft Bearing Assembly

Front Output Shaft Assembly Removal


Object Number: 1846030  Size: MF

Front Output Shaft Assembly Removal

Callout

Component Name

1

Transfer Case Front Case Half

Tip
Place the front case half on an arbor press.

2

Transfer Case Front Output Shaft Assembly

Tip
Press the front output shaft assembly from the front case half using an arbor press or soft-face hammer.

3

Transfer Case Front Output Shaft Seal