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 Cleaning And Inspection Points

Courtesy of GENERAL MOTORS COMPANY

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 NOTE: Replace the bearing if roughness, brinelling, or pitting is detected.
2	Transfer Case Control Actuator Lever Thrust Bearing Surface NOTE: Inspect for pitting, excessive wear, or damage. Refer to Service Parts Release Usage Change - NQH/NPO Control Actuator Levers in the New Product Information .
3	Transfer Case Control Actuator Lever Bearing Surface NOTE: Inspect for pitting, excessive wear or damage.
4	Transfer Case Control Lever Arm NOTE: Inspect for excessive wear or damage.
5	Transfer Case Control Actuator Lever Ball Ramps NOTE: Inspect for pitting, excessive wear or damage.
6	Transfer Case Control Actuator Lever Bearing NOTE: Replace the bearing if roughness, brinelling or pitting is detected.
7	Transfer Case Control Actuator Lever Balls NOTE: Replace the bearings if roughness or pitting is detected.
8	Transfer Case Control Actuator Lever Ball Ramps NOTE: Inspect for pitting, excessive wear or damage.
9	Transfer Case Control Actuator Lever Bearing NOTE: Replace the control actuator lever assembly if roughness, brinelling or pitting is detected.
10	Transfer Case Control Actuator Lever Bearing Surface NOTE: Inspect for pitting, excessive wear or damage.
11	Transfer Case Control Actuator Thrust Bearing NOTE: Replace the bearing if roughness, brinelling or pitting is detected.
12	Transfer Case Control Actuator Lever Washer NOTE: Inspect for pitting, excessive wear or damage.
13	Transfer Case Four Wheel Drive Clutch Pressure (Apply) Plate Washer Surface NOTE: Inspect for pitting, excessive wear or damage.
14	Transfer Case Four Wheel Drive Clutch Pressure (Apply) Plate Surface NOTE: Inspect for excessive wear, cracks or damage.
15	Transfer Case Four Wheel Drive Clutch Pressure Plate Springs NOTE: Inspect the springs for cracks.
16	Transfer Case Four Wheel Drive Clutch Pressure (Friction) Plates NOTE: Inspect for worn, grooved, burnt, or flaking friction material or warped friction plates.
17	Transfer Case Four Wheel Drive Clutch Pressure (Steel) Plates NOTE: Inspect for worn or warped steel plates.
18	Transfer Case Four Wheel Drive Clutch Hub Bearing Surface NOTE: Inspect for pitting, excessive wear or damage.
19	Transfer Case Four Wheel Drive Clutch Hub Teeth NOTE: 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 NOTE: Inspect for excessive wear, cracks, or damage.
21	Transfer Case Front Output Shaft Drive Sprocket Engagement Teeth NOTE: Inspect the engagement teeth for excessive looseness on the front output shaft drive sprocket.
22	Transfer Case Four Wheel Drive Clutch Housing Teeth NOTE: 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 NOTE: Inspect the splines for excessive looseness on the rear output shaft.
24	Transfer Case Two/Four Wheel Drive Actuator Cam Procedure 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 Procedure Inspect the spacer for wear or roughness. Refer to High/Low Shift Fork Replacement if damage is found.