Two/Four Wheel Drive Shift Components Cleaning and Inspection

WARNING: This page is about a different variant/trim than selected.

Fig 1: Two/Four Wheel Drive Shift Components

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
Preliminary Procedure Inspect all components or sub-components and perform any repair procedure necessary to fix the damage. If the damage cannot be repaired, replace the component or sub-component as indicated. Clean all components in cleaning solvent and air dry, except the clutch plates.
1	Transfer Case Control Actuator Thrust Bearing TIP: Replace the bearing if roughness, brinelling, or pitting is detected.
2	Transfer Case Control Actuator Lever Thrust Bearing Surface TIP: Inspect for pitting, excessive wear, or damage.
3	Transfer Case Control Actuator Lever Bearing Surface TIP: Inspect for pitting, excessive wear, or damage.
4	Transfer Case Control Lever Arm TIP: Inspect for excessive wear or damage.
5	Transfer Case Control Actuator Lever Ball Ramps TIP: Inspect for pitting, excessive wear, or damage.
6	Transfer Case Control Actuator Lever Bearing TIP: Replace the bearing if roughness, brinelling, or pitting is detected.
7	Transfer Case Control Actuator Lever Balls TIP: Replace the bearings if roughness or pitting is detected.
8	Transfer Case Control Actuator Lever Ball Ramps TIP: Inspect for pitting, excessive wear, or damage.
9	Transfer Case Control Actuator Lever Bearing TIP: Replace the control actuator lever assembly if roughness, brinelling, or pitting is detected.
10	Transfer Case Control Actuator Lever Bearing Surface TIP: Inspect for pitting, excessive wear, or damage.
11	Transfer Case Control Actuator Thrust Bearing TIP: Replace the bearing if roughness, brinelling, or pitting is detected.
12	Transfer Case Control Actuator Lever Washer TIP: Inspect for pitting, excessive wear, or damage.
13	Transfer Case Four Wheel Drive Clutch Pressure (Apply) Plate Washer Surface TIP: Inspect for pitting, excessive wear, or damage.
14	Transfer Case Four Wheel Drive Clutch Pressure (Apply) Plate Surface TIP: Inspect for excessive wear, cracks, or damage.
15	Transfer Case Four Wheel Drive Clutch Pressure Plate Springs TIP: Inspect the springs for cracks.
16	Transfer Case Four Wheel Drive Clutch Pressure (Friction) Plates TIP: Inspect for worn, grooved, burnt, or flaking friction material, or warped friction plates.
17	Transfer Case Four Wheel Drive Clutch Pressure (Steel) Plates TIP: Inspect for worn or warped steel plates.
18	Transfer Case Four Wheel Drive Clutch Hub Bearing Surface TIP: Inspect for pitting, excessive wear, or damage.
19	Transfer Case Four Wheel Drive Clutch Hub Teeth TIP: Inspect for excessive wear or damage. Excessive wear can be identified by steps in the teeth.
20	Transfer Case Four Wheel Drive Clutch Hub Friction Plate Surface TIP: Inspect for excessive wear, cracks, or damage.
21	Transfer Case Front Output Shaft Drive Sprocket Engagement Teeth TIP: Inspect the engagement teeth for excessive looseness on the front output shaft drive sprocket.
22	Transfer Case Four Wheel Drive Clutch Housing Teeth TIP: Inspect for excessive wear or damage. Excessive wear can be identified by steps in the teeth.
23	Transfer Case Four Wheel Drive Clutch Hub Splines TIP: Inspect the splines for excessive looseness on the rear output shaft.
24	Transfer Case Two/Four Wheel Drive Actuator Cam TIP: Inspect the cam lobes for wear or roughness. Refer to High/Low Shift Fork Replacement if damage is found.
25	Transfer Case Two/Four Wheel Drive Actuator Cam Spacer TIP: Inspect the spacer for wear or roughness. Refer to High/Low Shift Fork Replacement if damage is found.