Hummer H2. Manual — part 843

Begin the system diagnosis by reviewing the system DESCRIPTION & OPERATION . Reviewing the
Description and Operation will help you to determine the correct symptom diagnostic procedure when a
malfunction exists. Reviewing the Description and Operation information will also help you determine if the
condition described by the customer is normal operation. See SYMPTOMS - AXLE SHAFTS in order to
identify the correct procedure for diagnosing the system and where the procedure is located.

DIAGNOSTIC STARTING POINT - VIBRATION DIAGNOSIS AND CORRECTION

See DIAGNOSTIC STARTING POINT in VIBRATION/NOISE/LEAKS - DRIVETRAIN article in
GENERAL INFORMATION.

SYMPTOMS - AXLE SHAFTS

Before beginning diagnosis, review the system description and operation in order to familiarize yourself with
the system function. See DESCRIPTION & OPERATION .

Classifying The Symptom

Axle shaft symptoms can usually be classified into the following categories, Noises and Vibration:

z

For noise concerns, see TROUBLE SHOOTING in VIBRATION/NOISE/LEAKS - DRIVETRAIN
article in GENERAL INFORMATION.

z

For vibration concerns, see DIAGNOSTIC STARTING POINT in VIBRATION/NOISE/LEAKS -
DRIVETRAIN article in GENERAL INFORMATION.

Visual/Physical Inspection

z

Inspect the system for aftermarket devices which could affect the operation of the axle shaft.

z

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

SYMPTOMS - VIBRATION DIAGNOSIS AND CORRECTION

See SYMPTOMS in VIBRATION/NOISE/LEAKS - DRIVETRAIN article in GENERAL INFORMATION.

REMOVAL & INSTALLATION

CAUTION: When battery is disconnected, vehicle computer and memory systems

may lose memory data. Driveability problems may exist until computer
systems have completed a relearn cycle. Before disconnecting battery,
see appropriate COMPUTER RELEARN PROCEDURES article in GENERAL
INFORMATION.

NOTE:

Use the correct fastener in the correct location. Replacement fasteners must be
the correct part number for that application. Fasteners requiring replacement or

2004 Hummer H2

2003-04 DRIVE AXLES Axle Shafts - Front - Hummer H2

AXLE SHAFTS

Removal

1. Raise the vehicle. Remove the wheel and tire assembly. Remove the axle shaft center cap, if equipped.

2. Insert a drift or a large screwdriver through the brake caliper into one of the brake rotor vanes in order to

prevent the axle shaft from turning. See Fig. 2 . Remove the nut and the washer from the hub. DO NOT
reuse the nut. A NEW nut must be used when installing the axle shaft.

3. Using the Axle Remover (J-45859) or equivalent, press the axle shaft from the hub. See Fig. 3 . Remove

the six bolts securing the axle shaft inboard flange to the output shaft flange. See Fig. 4 . Remove the drift
from the rotor.

4. Disconnect the stabilizer shaft link from the lower control arm. Wrap shop towels around both the inner

and the outer axle shaft boots in order to avoid damage to the boots during removal. Pull the axle shaft
through the lower control arm opening.

fasteners requiring the use of thread locking compound or sealant are identified
in the service procedure. DO NOT use paints, lubricants, or corrosion inhibitors
on fasteners or fastener joint surfaces unless specified. These coatings affect
fastener torque and joint clamping force and may damage the fastener. Use the
correct tightening sequence and specifications when installing fasteners in
order to avoid damage to parts and systems.

NOTE:

Tool required: Axle Remover (J-45859).

2004 Hummer H2

2003-04 DRIVE AXLES Axle Shafts - Front - Hummer H2

Fig. 2: Removing Axle Shaft Nut & Washer
Courtesy of GENERAL MOTORS CORP.

2004 Hummer H2

2003-04 DRIVE AXLES Axle Shafts - Front - Hummer H2

Fig. 3: Pressing Axle Shaft From Hub
Courtesy of GENERAL MOTORS CORP.

2004 Hummer H2

2003-04 DRIVE AXLES Axle Shafts - Front - Hummer H2