Opel Frontera UBS. Manual - part 1939

DIFFERENTIAL (REAR 220mm) 4A2A–17

4. Set the dial indicator to “0”. Place it on the

mounting post of the gauging arbor with the
contact button touching the indicator pad. Force
the dial indicator downward until the needle has
made a half turn clockwise. Tighten down the dial
indicator in this position.

425RS020

Legend

(1) Dial Indicator
(2) Ganging Arbor
(3) Plunger
(4) Gauge Plate

5. Position the plunger on the gauge plate. Move the

gauging arbor slowly back and forth and locate
the position at which the dial indicator shows the
greatest defection. At this point, once again set
the dial indicator to “0”.
Repeat the procedure to verify the “0” setting.

425RS021

6. After the ZERO setting is obtained, rotate the

gauging arbor until the dial indicator rod does not
touch the gauging plate.
Record the number the dial indicator needle
points to.

425RS022

Legend

(1) Example=Dial indicator reading of 0.085

7. Record the pinion depth code on the head of the

drive pinion.
The number indicates a necessary change in the
pinion mounting distance. A plus number indi-
cates the need for a greater mounting distance
(which can be achieved by decreasing the shim
thickness). A minus number indicates the need
for a smaller mounting distance (which can be
achieved by increasing the shim thickness). If ex-
amination reveals pinion depth code “0”, the pin-
ion is “nominal”.

425RS023

4A2A–18 DIFFERENTIAL (REAR 220mm)

8. Select the shim using the chart;

Pinion

marking

Dial

indicator

reading

(Inches)

+10

+8

+6

+4

+2

0

–2

–4

–6

–8

–10

0.073

1.94

(0.0764)

1.96

(0.0772)

0.074

1.94

(0.0764)

1.96

(0.0772)

1.98

(0.0779)

0.075

1.94

(0.0764)

1.96

(0.0772)

1.98

(0.0779)

2.00

(0.0787)

0.076

1.94

(0.0764)

1.96

(0.0772)

1.98

(0.0779)

2.00

(0.0787)

2.02

(0.0795)

2.04

(0.0803)

0.077

1.96

(0.0772)

1.98

(0.0779)

2.00

(0.0787)

2.02

(0.0795)

2.04

(0.0803)

2.06

(0.0811)

0.078

1.94

(0.0764)

1.96

(0.0772)

1.98

(0.0779)

2.00

(0.0787)

2.02

(0.0795)

2.04

(0.0803)

2.06

(0.0811)

2.08

(0.0819)

0.079

1.94

(0.0764)

1.96

(0.0772)

1.98

(0.0779)

2.00

(0.0787)

2.02

(0.0795)

2.04

(0.0803)

2.06

(0.0811)

2.08

(0.0819)

2.10

(0.0827)

0.080

1.94

(0.0764)

1.96

(0.0772)

1.98

(0.0779)

2.00

(0.0787)

2.02

(0.0795)

2.04

(0.0803)

2.06

(0.0811)

2.08

(0.0819)

2.10

(0.0827)

2.12

(0.0835)

2.14

(0.0842)

0.081

1.96

(0.0772)

1.98

(0.0779)

2.00

(0.0787)

2.02

(0.0795)

2.04

(0.0803)

2.06

(0.0811)

2.08

(0.0819)

2.10

(0.0827)

2.12

(0.0835)

2.14

(0.0842)

2.16

(0.0850)

0.082

1.98

(0.0779)

2.00

(0.0787)

2.02

(0.0795)

2.04

(0.0803)

2.06

(0.0811)

2.08

(0.0819)

2.10

(0.0827)

2.12

(0.0835)

2.14

(0.0842)

2.16

(0.0850)

2.18

(0.0858)

0.083

2.00

(0.0787)

2.02

(0.0795)

2.04

(0.0803)

2.06

(0.0811)

2.08

(0.0819)

2.10

(0.0827)

2.12

(0.0835)

2.14

(0.0842)

2.16

(0.0850)

2.18

(0.0858)

2.20

(0.0866)

0.084

2.04

(0.0803)

2.06

(0.0811)

2.08

(0.0819)

2.10

(0.0827)

2.12

(0.0835)

2.14

(0.0842)

2.16

(0.0850)

2.18

(0.0858)

2.20

(0.0866)

2.22

(0.0874)

2.24

(0.0882)

0.085

2.06

(0.0811)

2.08

(0.0819)

2.10

(0.0827)

2.12

(0.0835)

2.14

(0.0842)

2.16

(0.0850)

2.18

(0.0858)

2.20

(0.0866)

2.22

(0.0874)

2.24

(0.0882)

2.26

(0.0890)

0.086

2.08

(0.0819)

2.10

(0.0827)

2.12

(0.0835)

2.14

(0.0842)

2.16

(0.0850)

2.18

(0.0858)

2.20

(0.0866)

2.22

(0.0874)

2.24

(0.0882)

2.26

(0.0890)

2.28

(0.0898)

0.087

2.12

(0.0835)

2.14

(0.0842)

2.16

(0.0850)

2.18

(0.0858)

2.20

(0.0866)

2.22

(0.0874)

2.24

(0.0882)

2.26

(0.0890)

2.28

(0.0898)

2.30

(0.0906)

2.32

(0.0913)

0.088

2.14

(0.0842)

2.16

(0.0850)

2.18

(0.0858)

2.20

(0.0866)

2.22

(0.0874)

2.24

(0.0882)

2.26

(0.0890)

2.28

(0.0898)

2.30

(0.0906)

2.32

(0.0913)

2.34

(0.0921)

0.089

2.16

(0.0850)

2.18

(0.0858)

2.20

(0.0866)

2.22

(0.0874)

2.24

(0.0882)

2.26

(0.0890)

2.28

(0.0898)

2.30

(0.0906)

2.32

(0.0913)

2.34

(0.0921)

2.36

(0.0929)

0.090

2.18

(0.0858)

2.20

(0.0866)

2.22

(0.0874)

2.24

(0.0882)

2.26

(0.0890)

2.28

(0.0898)

2.30

(0.0906)

2.32

(0.0913)

2.34

(0.0921)

2.36

(0.0929)

0.091

2.22

(0.0874)

2.24

(0.0882)

2.26

(0.0890)

2.28

(0.0898)

2.30

(0.0906)

2.32

(0.0913)

2.34

(0.0921)

2.36

(0.0929)

0.092

2.24

(0.0882)

2.26

(0.0890)

2.28

(0.0898)

2.30

(0.0906)

2.32

(0.0913)

2.34

(0.0921)

2.36

(0.0929)

0.093

2.26

(0.0890)

2.28

(0.0898)

2.30

(0.0906)

2.32

(0.0913)

2.34

(0.0921)

2.36

(0.0929)

0.094

2.28

(0.0898)

2.30

(0.0906)

2.32

(0.0913)

2.34

(0.0921)

2.36

(0.0929)

0.095

2.32

(0.0913)

2.34

(0.0921)

2.36

(0.0929)

0.096

2.34

(0.0921)

2.36

(0.0929)

0.097

2.36

(0.0929)

NOTE: When ordering shims, find the part number in the
parts catalog by using the thickness of shims listed in the
above table.

DIFFERENTIAL (REAR 220mm) 4A2A–19

4. Place the shim on the drive pinion, with the chamfered

side turned towards the pinion head then install the
inner bearing onto the pinion using an installer
9–8522–1165–0 and a press.

NOTE: Do not apply pressure to the roller cage and apply
pressure only to the inner race.

425RW048

5. Discard the used collapsible spacer and install a new

one.

6. Install pinion gear.
7. Install outer bearing.
8. Use oil seal installer 5–8840–2165–0 to install a new

oil seal that has been soaked in rear axle lubricant.

NOTE: Take care to use a front differential oil seal, NOT
the rear differential oil seal.

415RW029

9. Install dust cover.

10. Install flange.

11. Install flange nut.

1. Apply lubricant to the pinion threads.

2. Tighten the nut to the specified torque using the

pinion flange holder 5–8840–2157–0.

Torque: 245–294N·m (25.0–28.0kg·m/181–217 lb f
t)

NOTE: Discard used flange nut and install new one and
do not over tighten the flange nut.

425RW057

3. Adjust pinion bearing preload.

a. Measure the bearing preload by using a torque

meter. Note the scale reading required to
rotate the flange.

b. Continue tightening flange nut until the

specified starting torque is obtained.

Starting torque:
New bear-
ing 0.7–1.3 N·m(0.07-0.13kg·m/6.08–11.28 lb in)
Used bear-
ing 0.4–0.6N·m(0.04–0.06kg·m/3.04-5.64 Ib in)

425RS027

4. Using punch 5–8840–2293–0, stake the flange

nut at two points.

4A2A–20 DIFFERENTIAL (REAR 220mm)

NOTE: When staking, be sure to turn the nut to insure
that there is no change in bearing preload. Make sure of
preload again as instructed in 3).

415RW019

Legend

(1) 1.5mm or less

12. Install adjust shim.

1. Attach the side bearing to the differential

assembly without shims. Support the opposite
side using a pilot to prevent bearing damage.

425RS029

Legend

(1) Drive handle: 5–8840–0007–0
(2) Installer: 5–8840–2162–0
(3) Pilot: 5–8840–2196–0

2. Insert the differential cage assembly with bearing

outer races into the side bearing bores of the
carrier.

425RS030

3. Using two sets of feeler gauges, insert a feeler

stock of sufficient thickness between each
bearing outer race and the carrier to remove all
end play. Make certain the feeler stock is pushed
to the bottom of the bearing bores.
Mount the dial indicator 5–8840–0126–0 on the
carrier so that the indicator stem is at right angles
to a tooth on the ring gear.

425RW049