Opel Frontera UBS. Service manual — part 117

4A2A–24 DIFFERENTIAL (REAR 220mm)

Thickness of thrust washers available:

0.80 mm, 0.90 mm, 1.00 mm 1.10 mm, 1.20 mm,
1.30 mm (0.031 in, 0.035 in, 0.039 in,0.043 in,
0.047 in, 0.051 in)

425RS050

5. Install lock pin. After lock pin installation, stake the

cage to secure the lock pin.

425RS051

Legend

(1) Staked Portion
(2) Lock Pin

6. Clean the ring gear threaded holes to remove the

locking agent. When installing the ring gear, apply
LOCTITE 271 or equivalent to all the threaded area
and half of the unthreaded area of the bolt.

7. Tighten the bolts in diagonal sequence as illustrated.

Torque: 108 N·m (11.0kg·m/80 lb ft)

NOTE: Discard used bolts and install new ones.

415RW036

DIFFERENTIAL (REAR 220mm) 4A2A–25

Limited Slip Differential

Disassembled View

425RS053

Legend

(1) Screw
(2) Differential cage A
(3) Thrust washer
(4) Spring disc
(5) Spring disc
(6) Friction plate
(7) Friction disc
(8) Friction plate
(9) Friction disc

(10) Pressure ring

(11) Side gear

(12) Pinion and pinion shaft
(13) Side gear
(14) Pressure ring
(15) Friction disc
(16) Friction plate
(17) Friction disc
(18) Friction plate
(19) Spring disc
(20) Spring disc
(21) Thrust washer
(22) Differential cage B

4A2A–26 DIFFERENTIAL (REAR 220mm)

Disassembly

1. Using special tool, 5–8840–2381–0, grip it with a vice,

and set the differential.

425RS054

2. Gradually and evenly loosen the 4 fixing screws of the

differential cages A and B.

425RS055

3. Remove Differential cage A.
4. Remove Thrust washer.
5. Remove Spring disc.

NOTE: When removing the spring disc, friction disc, and
friction plate, place them in order for clear distinction of
left and right use.

6. Remove Spring disc.

7. Remove Friction plate.
8. Remove Friction disc.
9. Remove Friction plate.

10. Remove Friction disc.

11. Remove Pressure ring.

12. Remove Side gear.
13. Remove Pinion and pinion shaft.
14. Remove Side gear.
15. Remove Pressure ring.
16. Remove Friction disc.
17. Remove Friction plate.
18. Remove Friction disc.
19. Remove Friciton plate.
20. Remove Spring disc.
21. Remove Spring disc.
22. Remove Thrust washer.
23. Remove Differential cage B.

Inspection and Repair

Make necessary correction or parts replacement if wear,
damage, corrosion or any other abnormal condition is
found through inspection.

Visual check

Check the following parts for wear, damage, noise or any
other abnormal conditions.

D

Friction disc, friction plate and spring disc

425RS056

Legend

(1) Sliding surfaces
(2) Projections

DIFFERENTIAL (REAR 220mm) 4A2A–27

D

Pressure ring

425RS057

Legend

(3) Sliding surface with the friction disc. When

nicks or scratches are found, polish with an oil
stone and repair on a level block using a
compound.

(4) Sliding spherical surface with the pinion gear.
(5) Sliding surface with the side gear.
(6) V–shaped groove of the pressure ring and V

–shaped section of the pinion shaft.

(7) Fitting section with the case.
(8) Face contacting the inner surface of the

differential case. Repair burrs and nicks using
an oil stone.

D

Thrust washer

425RS058

Legend

(9) Sliding surface with the side gear or case.

(10) Peripheral groove of the side gear.

Repair light nicks and burrs using an oil stone.

D

Case

425RS059

Legend

(11) Contact surface with the spring disc.

(12) Inner groove of the differential cage B.

Repair light nicks and burrs using an oil stone.

425RS060