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Chevrolet Silverado / GMC Sierra. Manual - part 2852
Fig. 33: View Of High/Low Planetary Carrier Inspection Points
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.
The high/low planetary carrier is only serviced as an assembly.
Transfer Case High/Low Clutch Engagement
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Transfer Case - MP 1222/1225/1226-NQG - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado
HIGH/LOW SHIFT COMPONENTS CLEANING AND INSPECTION
Fig. 34: View Of High/Low Shift Components Inspection Points
Courtesy of GENERAL MOTORS CORP.
1
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 1222/1225/1226-NQG - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado
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.
4
Transfer Case High/Low Shift Fork Inserts
Tip: Inspect the inserts 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.
6
Transfer Case Control Actuator Shaft
Tip: Inspect the shaft for straightness.
7
Transfer Case Shift Fork Spring
Tip: Inspect the spring for breakage.
8
Transfer Case High/Low Shift Fork Pin
Tip: Inspect the pin for wear.
9
Transfer Case Two/Four Wheel Drive Mode
Cam Lobes
Tip: Inspect the cam lobes for wear or
roughness.
10
Transfer Case Shift Detent Plunger Cam Lobes
Tip: Inspect the cam lobes for wear or
roughness.
11
Transfer Case Shift Detent Lever Shaft
Tip: Inspect for scoring, brinelling, pitting, or
excessive wear.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Transfer Case - MP 1222/1225/1226-NQG - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado
TWO/FOUR WHEEL DRIVE SHIFT COMPONENTS CLEANING AND INSPECTION
Fig. 35: View Of Two/Four Wheel Drive Shift Component Inspection Points
Courtesy of GENERAL MOTORS CORP.
12
Transfer Case High/Low Shift Fork Cam Lobes
Tip: Inspect the cam lobes for wear or
roughness.
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 Two/Four Wheel Drive
Synchronizer Insert
Tip: Inspect the inserts for wear.
2
Transfer Case Two/Four Wheel Drive
Synchronizer Hub Engagement Teeth
Tip: Inspect the engagement teeth for wear.
Transfer Case Two/Four Wheel Drive
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Transfer Case - MP 1222/1225/1226-NQG - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado
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