1998 OPEL FRONTERA differential

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.
Friction disc, friction plate and spring disc
425RS056
Legend
(1) Sliding surfaces
(2) Projections

DIFFERENTIAL (REAR 220mm)
4A2A–27
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.
Thrust washer
425RS058
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(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.
Case
425RS059
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(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

4A2A–28
DIFFERENTIAL (REAR 220mm)
Legend
(7) Fitting section with the case.
(8) Face contacting the inner surface of the
differential case.
Repair burrs and nicks using an oil stone.
(9) Sliding surface with the side gear or case.
(11) Contact surface with spring disc.
Measure the Deformation of the friction disc & plate.
Limit: 0.08 mm (0.003 in)
425RS061
Measure the wear of the friction plate & disc
Limit(A–B): 0.1 mm (0.004 in)
Remarks:
A=Inner or outer projections
B=Sliding surface subjected to abrasion
425RS062
Measure the wear of the thrust washer
Limit: 1.3 mm (0.05 in)
425RS063
Reassembly
Adjust the clearance between the friction disc and plate.
1. Measuring the depth of the differential cage.
Standard (A–B): 80.58 mm (3.17 in)
(C): 10.58 mm (0.41 in)
425RS064
2. Measuring the overall length of the pressurering,
friction disc and friction plate.
Mount the pinion shaft in the pressurering and then
install the friction disc & plate.

DIFFERENTIAL (REAR 220mm)
4A2A–29
Measure the length between the plates over the
V–groove. (D)
425RS065
3. After measuring dimensions A,B,C and D, make
adjustment in the following manner:
Measure the thickness (E) of the spring disc.
1.75mm (0.069in)
4discs
4. Select the friction disc & plate so as to satisfy the
following equation:
{(A-B)+C}-(D+E)=0.06-0.20mm (0.002-0.008in)
Also, the total size difference of the friction disc &
plate and spring disc should be 0.05mm (0.02in) or
less.
Thickness :1.75–1.85mm(0.069–0.073 in)
Backlash adjustment of the side gear in
the direction of the shaft
1. Measuring the depth of the differential cage.
(F–B): 82.03 mm (3.23 in)
(G): 12.03 mm (0.47 in)
425RS066
2. Measuring the dimension between the thrust washers
at both ends.
Assemble the side gear, pinion, pinion shaft,
pressure ring and thrust washer, and pressing the
pressure ring to–the pinion shaft in the direction of
the shaft to make the clearance 0.
Have the side gear contact to the pinion to make the
backlash 0.
Measure the dimension (H) between thrust
washers at both ends.
425RS067

4A2A–30
DIFFERENTIAL (REAR 220mm)
3. After measuring dimensions of each of the above
sections, proceed with the adjustment in the following
manner:
Adjust the clearance to satisfy the equation below.
{(F – B) + G – H}=0.05 – 0.20 mm
Also, select the thrust washers so that the
dimensional difference between the back surfaces of
the left and right pressure rings to the thrust washers
is 0.05mm or less.
Thickness : 1.5mm (0.059 in)
1.6 mm(0.063 in)
1.7 mm(0.067 in)
NOTE: When assembling the parts, apply recommended
gear oil sufficiently to each of the parts, especially, to the
contact surfaces and sliding surfaces.
1. Install Differential cage B.
2. Install Thrust washer.
3. Install Spring disc.
When assembling the spring disc, make sure the
mounting direction is correct as shown in figure.
425RS068
Legend
(1) Friction Plate
(2) Spring Disc
(3) Friction Disc
4. Inatall Spring disc.
5. Inatall Friction plate.
6. Inatall Friction disc.
7. Inatall Friction plate.
8. Inatall Friction disc.
9. Inatall Pressure ring.
10. Inatall Side gear.
11. Inatall Pinion and pinion shaft.
12. Inatall Side gear.
13. Inatall Pressure ring.
14. Inatall Friction disc.15. Inatall Friction plate.
16. Inatall Friction disc.
17. Inatall Friction plate.
18. Inatall Spring disc.
When assembling the spring disc, make sure the
mounting direction is correct.
19. Inatall Spring disc.
20. Inatall Thrust washer.
21. Inatall Differential cage A.
22. Inatall Screw.
Matching the guide marks of the differential cages A
and B, tighten the screws evenly in the diagonal
order.
425RS055

DIFFERENTIAL (REAR 220mm)
4A2A–31
23. Check the operation.
Measure the starting torque using the side gear
holder.
Starting torque:
64–98Nꞏm(6.5–7.3kgꞏm/47–72Ibft)
425RW065
Legend
(1) Side Gear Holder : 5–8840–2381–0

4A2A–32
DIFFERENTIAL (REAR 220mm)
Main Data and Specifications
General Specifications
Rear axle
Ty p eBanjo, Semi–floating
Rear axle Size220mm(8.66in)
Gear typeHypoid
Gear ratio (to 1)4.555(6VD1,4JG2–TC)
4.777(4JG2)
Differential typeTwo pinion
Lubricant GradeGL–5: (Standard differential)
GL–5, LSD: (Limited slip differential)
Locking Differential Lubricant80W90 GL–5
(USE Limited Slip Differential Gear Lubricant or Friction
Modifier Organic Additive)
Capacity1.8liter(1.6 Imp qt/1.9 US qt)

DIFFERENTIAL (REAR 220mm)
4A2A–33
Torque Specifications
E04RW016