Opel Frontera UE. Manual - part 1307

4A2–26

DIFFERENTIAL (REAR)

5. Observe the pattern on the ring gear teeth and 

compare this with figure.

425RS039

Adjustments Affecting Tooth Contact

Two adjustments can be made which will affect tooth 
contact pattern: backlash, and the position of the drive 
pinion in the case.  The effects of bearing preloads are 
not readily apparent on head loaded tooth contact 
pattern tests; however,  these adjustments shuld be 
within specifications before proceeding with backlash 
and drive pinion adjustments.
The position of the drive pinion is adjusted by increasing 
or decreasing the distance between the pinion head and 
the centerline of the ring gear.
Decreasing the distance will move the pinion closer to 
the centerline of the ring gear. Increasing the distance 
will move the pinion farther away from the centerline of 
the ring gear.
Backlash is adjusted by means of the side bearing 
adjusting shims which move the entire case and ring 
gear assembly closer to, or farther from, the drive 
pinion. (The adjusting shims are also used to set side 
bearing preload.)
If the thickness of the right shim is increased (along with 
decreasing the left shim thickness), backlash will 
increase.
The backlash will decrease if the left shim thickness is 
increased (along with a decrease in right shim 
thickness).

SECTION

DIFFERENTIAL (REAR)

4A2–27

Differential Case Assembly

Disassembled View

425RW014

Legend

EndOFCallout

(1) Thrust Washer (for Pinion Gear)
(2) Pinion Mate Gear
(3) Thrust Washer(for Side Gear)
(4) Side Gear

(5) Differential Shaft
(6) Lock Pin
(7) Bolt
(8) Differential Case

SECTION

4A2–28

DIFFERENTIAL (REAR)

Disassembly

1. Remove lock pin using a small drift.

425RS098

2. Remove the differential shaft by using a soft metal 

rod and a hammer.

425RS043

3. Remove pinion mate gear and thrust washer.

4. Remove side gear and thrust washer.

Inspection and Repair

Make necessary correction or parts replacement if 
wear, damage, corrosion or any other abnormal 
condition are found through inspection.
Check the following parts.

• Ring gear, pinion gear

• Bearing

• Side gear, pinion mate gear, differential shaft

• Differential case, carrier

• Thrust washer

• Oil seal

Reassembly

1. Install side gear with thrust washer.

2. Install the pinion mate gear with thrust washer by 

engaging it with the side gears while turning both 
pinion mate gears simultaneously in the same 
direction.

425RS048

3. Install differential shaft.

1. Be sure to install the differential shaft so that it is 

in alignment with the lock pin hole in the 
differential case.

425RS049

4. Install lock pin.

After lock pin installation, stake the case to secure 
the lock pin.

SECTION

DIFFERENTIAL (REAR)

4A2–29

Limited Slip Differential Assembly

Disassembled View

425RW004

Legend

EndOFCallout

Disassembly

1. Place the holder 5–8840–2583–0 into a vise.

Position the differential on the holder with the ring 
gear side down.

2. Remove Lock pin (1) from differential shaft using a 

punch.

3. Remove Differential shaft (2) using hammer and 

punch.
Place shop towel behind case to prevent differential 
shaft from dropping out of case.

425RW005

(1) Thrust Washer–Differential Pinion Mate Gear
(2) Pinion Mate Gear
(3) Dished Spacer
(4) Disc
(5) Plate
(6) Differential Plate Retainer

(7) Lock Pin
(8) Differential Case
(9) Ring Gear Bolts

(10) Differential Shaft
(11) Differential Side Gear

SECTION