Rear Output Shaft Cleaning and Inspection

WARNING: This page is about a different car, the 2013 GMC Yukon XL, 2013 GMC Yukon, 2013 Chevrolet Tahoe, 2013 Chevrolet Suburban, and 2013 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Rear Output Shaft 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.
1	Transfer Case Rear Output Shaft Splines NOTE: Witness marks at the location of the yoke are normal.
2	Transfer Case Oil Pump and Rear Output Shaft Speed Reluctor Wheel Engagement Splines NOTE: Witness marks at the location of the components are normal.
3	Transfer Case Front Output Shaft Drive Sprocket Bearing Surface NOTE: Inspect for scoring, brinelling, pitting, or excessive wear.
4	Transfer Case Two/Four Wheel Drive Clutch Hub Engagement Splines NOTE: Witness marks at the location of the hub is normal.
5	Transfer Case Control Actuator Lever Bearing Surface NOTE: Inspect for scoring, brinelling, pitting, or excessive wear.
6	Transfer Case Control Actuator Lever Thrust Bearing Surface NOTE: Inspect for scoring, brinelling, pitting, or excessive wear.
7	Transfer Case Engagement Splines NOTE: Witness marks at the location of the splines is normal.
8	Transfer Case Input Shaft Pilot Bearing Surface NOTE: Inspect for scoring, brinelling, pitting, or excessive wear.
9	Oil Galleries NOTE: Compressed air may be necessary to clean the oil galleries.