Hummer H2. Manual - part 850

NOISY WHEN COASTING 

Noisy When Coasting 

INTERMITTENT NOISE 

Intermittent Noise 

CONSTANT NOISE 

Constant Noise 

Replacement .

Worn pinion bearings

Replace the pinion bearings. Refer to Drive Pinion Bearings 
Replacement .

Loose pinion bearings

Adjust the pinion bearings preload. Refer to Pinion Depth Adjustment .

Excessive pinion end play Adjust the pinion end play. Refer to Pinion Depth Adjustment .
Worn differential bearings Replace the differential bearings. Refer to Differential Side Bearings 

Replacement .

Loose differential bearings Adjust the differential bearing preload. Refer to Differential Side Bearing 

Preload Adjustment .

Excessive ring gear runout Replace the ring gear. Refer to Drive Pinion and Ring Gear Replacement .
Low oil level

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

Wrong or poor grade oil

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

Bent axle housing

Replace the axle housing. Refer to Rear Axle Housing Replacement .

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 Drive Pinion and Ring 
Gear Replacement .

Pinion and ring gear 
too tight

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

Checks

Action

Warped ring gear

Replace the ring gear. Refer to Drive Pinion and Ring Gear Replacement .

Loose differential case 
bolts

Tighten differential case bolts to specifications. Refer to Fastener Tightening 
Specifications .

Checks

Action

Flat spot on the pinion or the ring 
gear teeth

Replace the pinion and the ring gear. Refer to Drive Pinion and Ring 
Gear Replacement .

Flat spot on the pinion bearing

Replace the bearing. Refer to Drive Pinion Bearings Replacement .

Worn pinion splines

Replace the pinion. Refer to Drive Pinion and Ring Gear 
Replacement .

 

2004 Hummer H2 

2004 DRIVELINE/AXLE Rear Drive Axle - Hummer H2

  

NOISY ON TURNS 

Noisy on Turns 

WHEEL BEARING WEAR - REAR DRIVE AXLE (TAPERED) 

Tapered Roller Bearing Diagnosis 

Consider the following factors when diagnosing bearing condition: 

z

General condition of all parts during disassembly and inspection  

z

Classify the failure with the aid of the illustrations.  

z

Determine the cause.  

z

Make all repairs following recommended procedures.  

Abrasive Roller Wear 

Worn axle shaft dowel holes

Replace the axle shaft. Refer to Rear Axle Shaft Replacement .

Worn hub studs

Replace the wheel studs. Refer to Wheel Stud Replacement in Rear 
Suspension.

Checks

Action

Worn differential side gears, pinion gears, 
thrust washers and/or pinion shaft.

Replace the differential components as necessary. Refer to 
the following procedures: 

z

Locking Differential Disassemble in Rear Drive 
Axle - Locking/Limited Slip Rear Axle  

z

Locking Differential Assemble in Rear Drive Axle -
Locking/Limited Slip Rear Axle  

Worn axle shaft splines

Replace the axle shaft. Refer to Rear Axle Shaft 
Replacement .

 

2004 Hummer H2 

2004 DRIVELINE/AXLE Rear 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 Rear 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 Rear Drive Axle - Hummer H2