Chevrolet Silverado / GMC Sierra. Service manual — part 2893

Fig. 32: Front Output Shaft and Input Shaft 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 Input Shaft Seal Surface
Tip: Inspect for pitting, excessive wear, or
damage.

2

Transfer Case Input Shaft Bearing Surface
Tip: Inspect for excessive wear, damage, or if the
bearing has spun on the shaft.

3

Transfer Case Input Shaft Planetary Teeth
Tip: Inspect for broken, damaged, or debris
embedded in the root of the teeth.

4

Transfer Case Input Shaft Pilot Bearing Surface
Tip: If the bearing is removed, inspect for
excessive wear, damage, or if the bearing has spun
in the bore.

5

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

6

Transfer Case Input Shaft Pilot Bearing Assembly
Tip: Replace the bearing if roughness, brinelling,
or pitting is detected. Refer to Input Shaft Pilot
Bearing Replacement (Heavy Duty and Super
Heavy Duty) .

7

Transfer Case Input Shaft Pilot Bearing Assembly
Retaining Ring (Heavy Duty and Super Heavy
Duty only)

8

Transfer Case Front Output Shaft Front Bearing
Assembly
Tip: Replace the bearing if roughness, brinelling,

2008 Chevrolet Silverado 1500

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

Silverado

DRIVE CHAIN, DRIVE SPROCKET, AND DRIVEN SPROCKET CLEANING AND INSPE
INSPECTION

or pitting is detected. Refer to Front Output
Shaft Front and Rear Bearing Replacement.

9

Transfer Case Front Output Shaft Seal Surface
Tip: Inspect for pitting, excessive wear, or
damage.

10

Transfer Case Front Output Shaft Front Bearing
Surface
Tip: If the bearing is removed, inspect for
excessive wear, damage, or if the bearing has spun
on the shaft.

11

Transfer Case Front Output Shaft Driven Sprocket
Engagement Splines
Tip: Witness marks at the location of the sprocket
is normal.

12

Transfer Case Front Output Shaft Rear Bearing
Surface
Tip: If the bearing is removed, inspect for
excessive wear, damage, or if the bearing has spun
on the shaft.

13

Transfer Case Front Output Shaft Hole Plug
Tip: Replace the plug if removed. Refer to Front
Output Shaft Front and Rear Bearing
Replacement.

14

Transfer Case Front Output Shaft Rear Bearing
Assembly
Tip: Replace the bearing if roughness, brinelling,
or pitting is detected. Refer to Front Output
Shaft Front and Rear Bearing Replacement.

2008 Chevrolet Silverado 1500

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

Silverado

Fig. 33: Drive Chain, Drive Sprocket, and Driven Sprocket 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.

Replace any components if damage is found in this procedure. The sprockets must be
replaced as a pair.

Clean all components in cleaning solvent and air dry.

1

Transfer Case Front Output Shaft Drive Sprocket
Bearing Assembly
Tip: Replace the bearings if roughness, brinelling, or
pitting is detected. Refer to Front Output Shaft
Drive Sprocket Bearing Replacement .

2008 Chevrolet Silverado 1500

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

Silverado

HIGH/LOW PLANETARY CARRIER CLEANING AND INSPECTION

2

Transfer Case Front Output Shaft Drive Sprocket
Bearing Bore
Tip: If the bearing is removed, inspect for excessive
wear, damage, or if the bearing has spun in the bore.

3

Transfer Case Two/Four Wheel Drive Synchronizer
Sleeve Engagement Teeth
Tip: Inspect the engagement teeth for chips or
excessive wear.

4

Transfer Case Front Output Shaft Drive Sprocket
Tip:

Inspect for chipped teeth, excessively worn
gear surfaces, and debris embedded in the root
of the teeth.

Witness marks at the location of the chain is
normal.

5

Transfer Case Front Output Shaft Driven Sprocket
Tip:

Inspect for chipped teeth, excessively worn
gear surfaces, and debris embedded in the root
of the teeth.

Witness marks at the location of the chain is
normal.

6

Transfer Case Front Output Shaft Drive Chain
Assembly
Tip: Inspect for loose link pins, binding or stiff links,
debris embedded in the links, or worn teeth surfaces.

2008 Chevrolet Silverado 1500

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

Silverado