Hummer H2. Manual — part 904

NOISY WHEN COASTING

Noisy When Coasting

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Pinion Bearing Cup Installation

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Differential Carrier Assembly - Assemble

Worn pinion bearings

Replace the pinion bearings. Perform the following procedures:

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Differential Carrier Assembly - Disassemble

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Pinion Bearing Cup Installation

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Differential Carrier Assembly - Assemble

Loose pinion bearings

Adjust the pinion bearings preload. Perform the following procedures:

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Differential Carrier Assembly - Disassemble

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Differential Carrier Assembly - Assemble

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Backlash Inspection and Adjustment

Excessive pinion end play Adjust the pinion end play. Refer to Differential Carrier Assembly -

Assemble .

Worn differential bearings Replace the differential bearings. Perform the following procedures:

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Differential Carrier Assembly - Disassemble

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Differential Case Assembly Disassemble

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Differential Case Assembly Assemble

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Differential Carrier Assembly - Assemble

Loose differential
bearings

Adjust the differential bearing preload. Perform the following procedures:

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Differential Carrier Assembly - Disassemble

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Differential Carrier Assembly - Assemble

Excessive ring gear runout Replace the ring gear. Perform the following procedures:

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Differential Carrier Assembly - Disassemble

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Differential Carrier Assembly - Assemble

Low oil level

Fill the fluid level to specifications with the proper lubricant. Refer to
Lubricant Level Inspection - Front Drive Axle .

Wrong or poor grade oil

Drain and refill the system with the proper lubricant. Refer to Lubricant
Replacement - Front Drive Axle .

Checks

Action

DEFINITION: Noise is audible when slowing down and disappears when driving.
Worn pinion and ring
gear

Adjust or replace the pinion and the ring gear. Refer to Differential Carrier
Assembly - Disassemble .

Pinion and ring gear
too tight

Adjust the pinion and the ring gear backlash. Refer to Backlash Inspection and
Adjustment .

2004 Hummer H2

2004 DRIVELINE/AXLE Front Drive Axle - Hummer H2

INTERMITTENT NOISE

Intermittent Noise

CONSTANT NOISE

Constant Noise

NOISY ON TURNS

Noisy on Turns

WHEEL BEARING WEAR - FRONT DRIVE AXLE (TAPERED)

Tapered Roller Bearing Diagnosis

Consider the following factors when diagnosing bearing condition:

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General condition of all parts during disassembly and inspection.

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Classify the failure with the aid of the illustrations.

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Determine the cause.

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Make all repairs following recommended procedures.

Abrasive Roller Wear

Checks

Action

Warped ring gear

Replace the ring gear. Refer to Differential Carrier Assembly - Disassemble .

Loose differential
case assembly

Set the differential case assembly to the proper preload and backlash. Refer to
Differential Carrier Assembly - Assemble and Backlash Inspection and
Adjustment .

Checks

Action

Flat spot on the pinion or the
ring gear teeth

Replace the pinion and the ring gear. Refer to Differential Carrier
Assembly - Disassemble .

Flat spot on the pinion bearing

Replace the bearing. Refer to Differential Carrier Assembly -
Disassemble .

Worn pinion splines

Replace the pinion. Refer to Differential Carrier Assembly -
Disassemble .

Checks

Action

Worn differential side gears
and pinions

Replace the differential side gears and pinions. Refer to Differential
Case Assembly Disassemble .

Worn differential spider

Replace the spine gears. Refer to Differential Case Assembly
Disassemble .

Worn axle shaft splines

Replace the axle shaft. Refer to Inner Shaft and/or Housing
Replacement - Front Drive Axle .

2004 Hummer H2

2004 DRIVELINE/AXLE Front Drive Axle - Hummer H2

Fig. 2: Abrasive Roller Wear
Courtesy of GENERAL MOTORS CORP.

Pattern on the races and the rollers caused by fine abrasives. Clean all of the parts and the housings. Check the
seals and the bearings. Replace any leaky, rough, or noisy bearings.

Abrasive Step Wear

2004 Hummer H2

2004 DRIVELINE/AXLE Front Drive Axle - Hummer H2

Fig. 3: Abrasive Step Wear
Courtesy of GENERAL MOTORS CORP.

Pattern on the roller ends caused by fine abrasives. Clean all of the parts and the housings. Check the seals and
the bearings. Replace any leaky, rough, or noisy bearings.

Galling

2004 Hummer H2

2004 DRIVELINE/AXLE Front Drive Axle - Hummer H2