Opel Frontera UE. Manual - part 695

4B–22

DRIVELINE CONTROL SYSTEM

4WD Control Unit

4WD Control Unit Associated Parts

412RW042

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(1) Center Console Assembly

(2) 4WD Control Unit

DRIVELINE CONTROL SYSTEM

4B–23

Removal

1. Remove center console assembly.

Refer to Interior Trim in Body and Accessories 
section.

2. Remove two screws and harness connector (1) from 

4WD control unit.

412RW041

Legend

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Installation

1. Connect harness connector, then install 4WD 

control unit.

2. Install center console assembly.

(1) Harness Connector

DRIVE SHAFT SYSTEM

4C–1

DRIVELINE/AXLE

DRIVE SHAFT SYSTEM

CONTENTS

Service Precaution......................................... 4C - 1
General Description ....................................... 4C - 2

Diagnosis .................................................... 4C - 2

Front Hub and Disc ....................................... 4C - 3

Disassembled View .................................... 4C - 3
Disassembly ............................................... 4C - 3
Inspection and Repair................................. 4C - 4
Reassembly ................................................ 4C - 5

Front Drive Shaft Joint .................................. 4C - 8

Front Drive Shaft Joints Replacement ........ 4C - 8

Front Axle Drive Shaft ................................... 4C - 9

Front Axle Drive Shaft and 

Associated Parts ..................................... 4C - 9

Disassembly ............................................... 4C - 10
Inspection And Repair ................................ 4C - 11
Bushing Replacement ................................ 4C - 11
Reassembly ................................................ 4C - 11

Shift On The Fly System ............................... 4C - 14

Shift On The Fly System and 

Associated Parts ..................................... 4C - 14

Disassembly ............................................... 4C - 14
Inspection And Repair ................................ 4C - 16
Reassembly ................................................ 4C - 19
Main Data and Specifications ..................... 4C - 22
Special Tools .............................................. 4C - 24

Propeller Shaft .............................................. 4C - 25

General Description .................................... 4C - 25
Universal Joint ............................................ 4C - 26
Diagnosis of Propeller Shaft and 

Universal Joint......................................... 4C - 27

Front Propeller Shaft ..................................... 4C - 28

Front Propeller Shaft and 

Associated Parts ..................................... 4C - 28

Removal...................................................... 4C - 28
Installation................................................... 4C - 29
Slip Joint Disassembly................................ 4C - 29
Universal Joint Disassembly 

(Single Cardan Type) .............................. 4C - 30

Universal Joint Disassembly 

(Double Cardan Type)............................. 4C - 32

Inspection and Repair................................. 4C - 33
Universal Joint Reassembly 

(Single Cardan Type) .............................. 4C - 35

Universal Joint Reassembly 

(Double Cardan Type)............................. 4C - 36

Slip Joint Reassembly ................................ 4C - 38
Main Data and Specifications ..................... 4C - 39

Rear Propeller Shaft...................................... 4C - 40

Rear Propeller Shaft and 

Associated Parts ..................................... 4C - 40

Removal...................................................... 4C - 40
Installation................................................... 4C - 40
Slip Joint Disassembly................................ 4C - 41
Universal Joint Disassembly....................... 4C - 42
Inspection ................................................... 4C - 44
Universal Joint Reassembly ....................... 4C - 45
Slip Joint Reassembly ................................ 4C - 46

Main Data and Specifications ........................ 4C - 47

Service Precaution

WARNING:  THIS VEHICLE HAS A SUPPLEMENTAL 
RESTRAINT SYSTEM (SRS).   REFER TO THE SRS 
COMPONENT AND WIRING LOCATION VIEW IN 
ORDER TO DETERMINE WHETHER  YOU ARE 
PERFORMING SERVICE ON OR NEAR THE SRS 
COMPONENTS OR THE SRS WIRING.  WHEN YOU 
ARE PERFORMING SERVICE ON OR NEAR THE 
SRS COMPONENTS OR THE SRS WIRING,  REFER 
TO THE SRS SERVICE INFORMATION. FAILURE TO 
FOLLOW WARNINGS COULD RESULT  IN 
POSSIBLE AIR BAG DEPLOYMENT, PERSONAL 
INJURY, OR OTHERWISE UNNEEDED SRS SYSTEM 
REPAIRS.

CAUTION:  Always use the correct fastener in the 
proper location.  When you replace a fastener, use 
ONLY the exact part number for that application. 
ISUZU will  call out those fasteners that require a 
replacement after removal. ISUZU will also call out 
the  fasteners that require thread lockers or thread 
sealant. UNLESS OTHERWISE SPECIFIED, do  not 
use supplemental coatings (Paints, greases, or 
other corrosion inhibitors) on threaded  fasteners or 
fastener joint interfaces. Generally, such coatings 
adversely affect the fastener  torque and the joint 
clamping force, and may damage the fastener. When 
you install fasteners,  use the correct tightening 
sequence and specifications. Following these 
instructions can help you  avoid damage to parts 
and systems.

SECTION

4C–2

DRIVE SHAFT SYSTEM

General Description

This publication contains essential removal, installation,
adjustment and maintenance  procedures.
The front axle utilizes a central disconnect type front
axle/transfer case system.

The drive axles are completely flexible assemblies,
consisting of inner and outer constant velocity (CV)
drive  shaft joints connected by an axle shaft.
For description of front propeller shaft and universal
joint, refer to Front Propeller Shaft in this section.

Diagnosis

Condition

Possible cause

Correction

Oil Leak At Front Axle

Worn or defective oil seal.

Replace the oil seal.

Front axle housing cracked.

Repair or replace.

Oil Leak At Pinion Shaft

Too much gear oil.

Correct the oil level.

Oil seal worn or defective.

Replace the oil seal.

Pinion flange loose or damaged.

Tighten or replace.

Noises In Front Axle Drive Shaft 
Joint

Broken or worn drive shaft joints and 
bellows (BJ and DOJ).

Replace the drive shaft joints and 
bellows.

“Clank" When Accelerating From 
“Coast"

Loose drive shaft joint to output 
shaft bolts.

Tighten.

Damaged inner drive shaft joint.

Replace.

Shudder or Vibration During 
Acceleration

Excessive drive shaft joint angle.

Repair.

Worn or damaged drive shaft joints.

Replace.

Sticking spider assembly (inner 
drive shaft joint).

Lubricate or replace.

Sticking joint assembly (outer drive 
shaft joint).

Lubricate or replace.

Vibration At Highway Speeds

Out of balance or out of round tires.

Balance or replace.

Front end out of alignment.

Align.

Noises in Front Axle

Insufficient gear oil.

Replenish the gear oil.

Wrong or poor grade gear oil.

Replace the gear oil.

Drive pinion to ring gear backlash 
incorrect.

Adjust the backlash.

Worn or chipped ring gear, pinion 
gear or side gear.

Replace the ring gear, pinion gear or 
side gear.

Pinion shaft bearing worn.

Replace the pinion shaft bearing.

Wheel bearing worn.

Replace the wheel bearing.

Differential bearing loose or worn.

Tighten or replace.

Wanders and Pulls

Wheel bearing preload too tight.

Adjust the wheel bearing preload.

Incorrect front alignment.

Adjust the front alignment.

Steering unit loose or worn.

Tighten or replace.

Tire worn or improperly inflated.

Adjust the inflation or replace.

Front or rear suspension parts loose 
or broken.

Tighten or replace.

Front Wheel Shimmy

Wheel bearing worn or improperly 
adjusted.

Adjust or replace.

Incorrect front alignment.

Adjust the front alignment.

Worn ball joint or bush.

Replace the ball joint or bush.

Steering unit loose or worn.

Tighten or replace.

Tire worn or improperly inflated.

Replace or adjust the inflation.

Shock absorber worn.

Replace the shock absorber.