Hummer H3. Manual — part 894

DIAGNOSTIC INFORMATION AND PROCEDURES

DIAGNOSTIC STARTING POINT - WHEEL DRIVE SHAFTS

Begin the system diagnosis by reviewing the system Description and Operation. Reviewing the
Description and Operation will help you to determine the correct symptom diagnostic procedure
when a malfunction exist. Reviewing the Description and Operation information will also help
you determine if the condition described by the customer is normal operation. Refer to
Symptoms - Wheel Drive Shafts in order to identify the correct procedure for diagnosing the
system and where the procedure is located.

SYMPTOMS - WHEEL DRIVE SHAFTS

Before beginning diagnosis, review the system description and operation in order to familiarize
yourself with the system function. Refer to Wheel Drive Shafts Description and Operation.

Classifying the Symptom

Wheel Drive Shaft symptoms can usually be classified into the following categories:

Noises

Vibrations

Noise related concerns are diagnosed within the Wheel Drive Shafts section. For vibration
related symptoms, refer to Diagnostic Starting Point - Vibration Diagnosis and Correction
for diagnosis.

Visual/Physical Inspection

Inspect the system for aftermarket devices which could affect the operation of the wheel
drive shafts.

Inspect the easily accessible or visible system components for obvious damage or conditions
which could cause the symptom.

6

Inner Race

7

Cage

8

Large Retaining Clamp

9

Inner Seal

10

Small Retaining Clamp

11

Drive Shaft Bar

2007 Hummer H3

2007 Driveline/Axle Wheel Drive Shafts - H3

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the
symptom:

Click Noise In Turns

Clunk When Accelerating from Coast

Clunk Noise When Accelerating During Turns

CLICK NOISE IN TURNS

Click Noise In Turns

CLUNK WHEN ACCELERATING FROM COAST

Clunk When Accelerating from Coast

Step

Action

Yes

No

DEFINITION: Clicking noise while turning in drive under load.

1

Check for worn or damaged outer CV joints.
Are the outer CV joints/seals worn?

Go to Step 2

System OK

2

Replace the outer CV joints/seals. Refer to
Wheel Drive Shaft Outer Joint and Boot
Replacement.
Is the repair complete?

System OK

-

Step

Action

Yes

No

DEFINITION: A clunking noise present when accelerating from coast to drive under load.

1

Check for a loose wheel drive shaft to hub
assembly nut.
Is the wheel drive shaft nut loose?

Go to Step 2

Go to Step 3

2

Tighten the wheel drive shaft to hub
assembly nut to specification. Refer to
Fastener Tightening Specifications.
Is the repair complete?

System OK

-

3

Check for a damaged inner CV joint.
Is the inner CV joint damaged?

Go to Step 4

System OK

4

Replace the inner CV joint. Refer to
Wheel Drive Shaft Inner Joint and Boot
Replacement.
Is the repair complete?

System OK

-

2007 Hummer H3

2007 Driveline/Axle Wheel Drive Shafts - H3

CLUNK NOISE WHEN ACCELERATING DURING TURNS

Clunk Noise When Accelerating During Turns

REPAIR INSTRUCTIONS

WHEEL DRIVE SHAFT REPLACEMENT

Removal Procedure

Step

Action

Yes

No

1

Check for worn or damaged outer wheel
drive shaft joints and/or seals.
Are the outer wheel drive shaft joints/seals
worn?

Go to Step 2

System OK

2

Check for proper clearance between the
wheel drive shaft and other components.
Correct as necessary.
Is the repair complete?

System OK

Go to Step 3

3

Replace the outer CV joints/seals. Refer to
Wheel Drive Shaft Outer Joint and Boot
Replacement.
Is the repair complete?

System OK

-

2007 Hummer H3

2007 Driveline/Axle Wheel Drive Shafts - H3

Fig. 2: View Of Tire & Wheel Assembly
Courtesy of GENERAL MOTORS CORP.

1. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation

2007 Hummer H3

2007 Driveline/Axle Wheel Drive Shafts - H3