Chevrolet Silverado / GMC Sierra. Service manual — part 2894

Fig. 34: High/Low Planetary Carrier Cleaning and Inspection
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. Do not spin the planetary gears
with compressed air.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - MP 1625/1626-NQF - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

HIGH/LOW SHIFT COMPONENTS CLEANING AND INSPECTION

The high/low planetary carrier is only serviced as an assembly.

1

Transfer Case High/Low Clutch Engagement
Teeth
Tip: Inspect the engagement teeth for chips or
excessive wear.

2

Transfer Case Planetary Carrier Sun Gear
Thrust Washer Surface
Tip: Inspect the thrust washer surface for
scoring or excessive wear.

3

Transfer Case High/Low Planetary Carrier
Pinion Gear Thrust Washer
Tip: Inspect for a thrust washer being on each
side of the planetary gears.

4

Transfer Case High/Low Planetary Pinion Gear
Tip: Inspect for broken, damaged, or debris
embedded in the root of the teeth.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - MP 1625/1626-NQF - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Fig. 35: High/Low Shift Components Cleaning and Inspection
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.

1

Transfer Case High/Low Clutch Inner Splines
Tip: Inspect the inner splines for excessive
looseness on the rear output shaft.

2

Transfer Case High/Low Clutch Teeth
Tip: Inspect the engagement teeth for chips or
excessive wear.

3

Transfer Case High/Low Shift Fork Collar
Tip: Inspect the shift fork collar for wear.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - MP 1625/1626-NQF - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

TWO/FOUR WHEEL DRIVE SHIFT COMPONENTS CLEANING AND INSPECTION

4

Transfer Case High/Low Shift Fork Pads
Tip: Inspect the pads for wear.

5

Transfer Case High/Low Shift Fork
Tip: Inspect for cracks, broken areas, or other
damage. The component must be replaced if
damage is found. Refer to High/Low Shift Fork
Replacement.

6

Transfer Case Control Actuator Shaft
Tip: Inspect the shaft splines for excessive wear.
The component must be replaced if damage is
found. Refer to High/Low Shift Fork
Replacement.

7

Transfer Case High/Low Shift Fork Pin
Tip: Inspect the pin for wear. The component
must be replaced if damage is found. Refer to
High/Low Shift Fork Replacement.

8

Transfer Case High/Low Shift Fork Spring
Assembly
Tip: Inspect the cam lobes for wear or roughness.
The component must be replaced if damage is
found. Refer to High/Low Shift Fork
Replacement.

9

Transfer Case Shift Fork Spring
Tip: Inspect the spring for breakage. The
component must be replaced if damage is found.
Refer to High/Low Shift Fork Replacement.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Transfer Case - MP 1625/1626-NQF - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado