1

Transfer Case Input Shaft Bearing Assembly

2

Transfer Case Input Shaft Inner Retaining Ring

3

Transfer Case High/Low Planetary Carrier Assembly

4

Transfer Case Planetary Carrier Sun Gear Thrust Washer

5

Transfer Case Input Shaft

6

Transfer Case Planetary Carrier Sun Gear Thrust Washer

7

Transfer Case High/Low Locking Plate

8

Transfer Case High/Low Planetary Carrier Retaining Ring

9

Transfer Case Input Shaft/Planetary Assembly

10

Transfer Case Input Shaft Bearing Outer Retaining Ring

11

Transfer Case Shift Lever Seal

Tip

Special Tools

12

Transfer Case Shift Detent Lever Assembly

13

Transfer Case Shift Detent Plunger

14

Transfer Case Shift Detent Spring

15

Transfer Case Shift Detent Plunger Plug Seal

Tip
Lightly lubricate the O-ring with clean DEXRON®VI.

16

Transfer Case Shift Detent Plunger Plug

Tighten
20 N·m (15 lb ft)

1

Transfer Case Rear Output Shaft

2

Transfer Case Two/Four Wheel Drive Synchronizer Hub

3

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

Tip
Ensure that the inserts are installed in the correct orientation in the synchronizer hub. The inserts should be able to move when correctly installed.

4

Transfer Case Two/Four Wheel Drive Synchronizer Sleeve

5

Transfer Case Two/Four Wheel Drive Synchronizer Assembly

6

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

7

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

8

Transfer Case Front Output Shaft Drive Sprocket

9

Transfer Case Front Output Shaft Drive Sprocket Spacer - Rear

10

Transfer Case Front Output Shaft Drive Sprocket Retaining Ring

11

Transfer Case Oil Pump Assembly

12

Transfer Case Rear Output Shaft Speed Reluctor Wheel

13

Transfer Case Rear Output Shaft Rear Bearing Retaining Ring

14

Transfer Case Rear Output Shaft Rear Bearing Assembly

Tip

15

Transfer Case Rear Output Shaft Rear Bearing Retaining Ring

16

Transfer Case High/Low Clutch

17

Transfer Case Rear Output Shaft Assembly

1

Transfer Case High/Low Shift Fork

2

Transfer Case Two/Four Wheel Drive Shift Fork Assembly

3

Transfer Case Control Actuator Shaft

4

Transfer Case Shift Fork Spring

1

Transfer Case Front Output Shaft Assembly

2

Transfer Case Front Output Shaft Drive Chain Assembly, Transfer Case Front Output Shaft Driven Sprocket

Tip

3

Transfer Case Oil Pump Suction Pipe Seal

Tip

4

Transfer Case Oil Pump Suction Pipe

1

Transfer Case Front Output Shaft Driven Sprocket Spacer

2

Transfer Case Front Output Shaft Driven Sprocket Spacer Spring

Tip
Ensure the spacer spring is properly positioned into the spacer groove.

3

Sealer GM P/N 12345739 (Canadian P/N 10953541) or Equivalent

Notice: Apply the proper amount of sealant to the flange when assembling the transfer case. Excessive amounts of sealant can plug the oil pump screen, resulting in internal component failure.

Tip

4

Transfer Case Rear Case Half

Tip

5

Transfer Case Bracket

6

Transfer Case Bolts (Qty: 17)

Notice: Refer to Fastener Notice in the Preface section.

Tip
Tighten the bolts by hand. Do not use an air gun.

Tighten
25 N·m (18 lb ft)

Preliminary Procedures

The following procedure is for the light duty application, for the heavy duty and super heavy duty applications. Refer to Rear Output Shaft Bushing Replacement.

1

Transfer Case Rear Output Shaft Bushing (Light Duty)

Tip

1. Install the bushing on the finger section of the J 45380 .
2. Install the finger section to the main body of the J 45380 .
3. Position the bushing and tool to the rear case half.
4. Press the bushing until the tool bottoms on the rear case half.

Special Tools

J 45380 Transfer Case Rear Bushing Remover and Installer

2

Transfer Case Rear Output Shaft Seal (Light Duty)

Tip
Align the notch on the seal between the rear output bearing retaining ring access holes. This will position the weep hole down.

Special Tools

3

Transfer Case Rear Output Shaft Seal (Heavy Duty and Super Heavy Duty)

Tip
Align the notch on the seal between the rear output bearing retaining ring access holes. This will position the weep hole down.

Special Tools

1

Transfer Case Access Hole Plugs (Qty: 2)

2

Transfer Case Oil Fill Plug

Notice: Refer to Component Fastener Tightening Notice in the Preface section.

Tip
Apply pipe sealant GM P/N 12346004 (Canadian P/N 10953480) to the oil fill plug before installation.

Tighten
18 N·m (13 lb ft)

3

Transfer Case Oil Drain Plug

Tip
Apply pipe sealant GM P/N 12346004 (Canadian P/N 10953480) to the oil drain plug before installation.

Tighten
18 N·m (13 lb ft)

4

Transfer Case Lever

5

Transfer Case Control Lever Bolt/Screw

Notice: Refer to Fastener Notice in the Preface section.

Tip
Apply threadlocker GM P/N 12345382 (Canadian P/N 10953489) to the control lever bolt before installation.

Tighten
27 N·m (20 lb ft)

6

Transfer Case Shift Lever Washer

7

Transfer Case Vent

Tip
Apply retaining compound GM P/N 12377901 (Canadian P/N 10953504) to the vent pipe before installation, if removed during disassembly.

8

Transfer Case Selector Switch - O-Ring - Seal

Tip
Lightly lubricate the O-ring with clean DEXRON®VI.

9

Transfer Case Shift Control Switch Assembly

Tighten
27 N·m (20 lb ft)

10

Vehicle Speed Sensor O-Ring Seal

Tip
Lightly lubricate the O-ring with clean DEXRON®VI.

11

Vehicle Speed Sensor Assembly

Tighten
17 N·m (13 lb ft)

1

Transfer Case Input Shaft Seal

Tip
Ensure the bore of the front case half is free of dirt, oil, and cleaning solvent.

Special Tools

J 42738 Seal Installer

2

Transfer Case Front Output Shaft Seal

Special Tools

3

Transfer Case Assembly

Tip
Remove from J 3289-20 and remove the J 45759 from the transfer case.

Special Tools