1998 ISUZU TROOPER transmission oil

7A±43 AUTOMATIC TRANSMISSION (4L30±E)
Rear Oil Seal (Extension Housing)
Removal
1. Remove transfer case assembly from the vehicle.
Refer to Transfer Case in Drive Line/Axle section.
2. Remove rear oil seal from transmission extension
housing.
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Installation
1. Use 5±8840±2282±0 (J±36797) extension housing
oil seal installer, and install the rear oil seal to the
transmission extension housing.
2. Install the transfer case assembly to the vehicle.
Refer to Transfer Case in Drive Line/Axle section.
Transmission (4L30±E)
Disassembly
NOTE: During the disassembly and reassembly, perform
the following:

Wash each part thoroughly, and blow air through each
oil passage and groove to eliminate blockage.

Seal rings, roll pins, and gaskets should be replaced.

When assembling the components, apply
DEXRON)±III Automatic Transmission Fluid (ATF)
to each seal, rotating part, and sliding part.

Do not dip part facings, such as clutch or brake drive
plates, in cleaner when washing it.
Also, always coat parts with new ATF two or three
times after cleaning with solvent.
1. Remove torque converter (1).

Drain fluid from torque converter.

Attach 5±8840±2278±0 (J±8763±02) holding
fixture to the transmission and set it on
5±8840±0003±0 (J±3289±20) holding fixture base.
NOTE: Do not overtighten the tool, as case damage may
result.
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2. Remove O±ring (2) from turbine shaft.
3. Remove two 10mm mode switch screws, selector
lever nut, cover, and mode switch (3).
4. Remove twelve 10mm adapter case oil pan (4) fixing
screws, adapter oil pan, and gasket.
5. Disconnect electrical wiring connections (5) from
solenoids and 5 pin connector of adapter case. Pull
on connectors only, not on wiring harness.

7A±44
AUTOMATIC TRANSMISSION (4L30±E)
6. Remove seven 13mm adapter case valve body (6)
fixing screws, adapter case valve body assembly,
transfer plate, and two gaskets.

Remove wiring harness and 5 pin connector.
7. Remove sixteen 10mm main case oil pan (7) fixing
screws, main oil pan, magnet, and gasket.
8. Remove three 13mm oil filter (8) fixing screws and oil
filter.
9. Remove two 13mm manual detent (9) fixing screws,
roller and spring, and manual detent.
10. Disconnect wiring harness assembly (10) from band
apply solenoid, shift solenoids, and main case 4 pin
connector.
Pull on connectors only, not on wiring harness.11. Remove four 13mm servo cover (11) fixing screws,
servo cover, and gasket.
12. Remove seven 13mm valve body screws and ground
wire from main case.

Remove wiring harness assembly (5) from the
adapter case side.

Remove main valve body assembly (12) with
manual valve link and transfer plate. Note the
position of the link (long end into valve, short end
into range selector lever).

Remove 4 pin connector.

Remove gasket transfer plate from main case.
13. Remove two check balls (13) from main case.
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14. Turn transmission to vertical position to drain fluid.
Return back to horizontal position when drained.

Install 5±8840±0501±0 (J±23075) servo piston
spring compressor with offset to the rear of case.

Compress servo piston assembly.
Remove servo piston retaining ring (14).

Slowly release servo piston assembly (15).

Remove tool.
15. Remove servo piston assembly (15), return spring
(16), and servo apply rod (17).

7A±45 AUTOMATIC TRANSMISSION (4L30±E)
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16. Rotate transmission to horizontal position, pan side
down.

Remove one 10mm screw, and speed sensor (18)
with ªOº ring.
17. Remove seven 8mm extension housing hexagon
socket head screws, extension housing assembly
(19), and gasket.
18. Remove retaining ring (20).
NOTE: Use extra long, needle- nose pliers.
19. Remove speed wheel (21).
20. Remove wheel parking lock (with seal ring) (22).
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21. Rotate transmission to vertical position, converter
housing up.

Loosen the converter housing and oil pump
assembly fixing screws, but do not remove the five
13 mm inner screws if oil pump disassembly is
required.

Remove seven outer screws.

Remove converter housing and oil pump assembly
(23).
22. Remove gasket (24).
23. Remove selective thrust washer (25).

7A±47 AUTOMATIC TRANSMISSION (4L30±E)
36. Separate second (40) and third clutch (41)
assemblies.
37. Remove thrust washer (42).
38. Remove reverse clutch plates (43 and 44) and
reverse clutch pressure plate (45).
39. Remove bearing (46) and washer (47).
40. Remove planetary carrier assembly (48).
41. Remove thrust bearing (49).
42. Remove reaction sun gear (50)
43. Remove needle bearing (51).
44. Remove brake drum (52).
45. Remove brake band (53).
46. Remove thrust bearing (54).
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47. Rotate case to horizontal position, valve body side
facing up.

Remove spring pin (55), using cutting pliers, then
remove parking lock and selector lever assembly
(56).NOTE: Insert wire in the center of the spring pin to
prevent it from collapsing during removal. Be aware of pin
height. Protect machined face of main case.
48. Remove parking lock and range selector lever 17 mm
nut (57).
49. Remove parking lock and range selector lever (56),
and actuator assembly.
50. Remove selector shaft (58).
NOTE: Inspect the shaft for burrs before removing to
prevent damaging seal. If necessary, remove burrs by
lightly sanding with an oilstone.
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Reassembly
1. Inspect selector shaft seal, and replace it if
necessary.
NOTE: Use a seal installer when replacing the seal.

Install selector shaft.
NOTE: Spring pin groove must be positioned inside the
case.
2. Install spring pin. Be sure the selector shaft can move
freely. Do not push the pin flush with the case surface.
Leave enough height for removal.
3. Install actuator assembly (1).
4. Install parking lock and range selector lever (2) and
new 17 mm nut. Tighten the nut to the specified
torque.
Torque: 22 Nwm (2.2 kg´m/16 lb ft)

7A±52
AUTOMATIC TRANSMISSION (4L30±E)
33. Install fourth clutch retainer (31) with the notch facing
up and positioned towards valve body surface.
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34. Overdrive clutch end play measurement
1. Install the 5±8840±2262±0 (J±23085±A)
selective washer gauging tool on the adapter
case flange and against the input shaft.
2. Position the inner shaft of the tool against the
thrust surface of the overrun clutch housing.
3. Tighten thumb screw. Remove the tool.
4. Measure gap. Select appropriate size washer as
shown in the chart.
5. Set selective thrust washer aside.
Selective Thrust Washer
Gap: mm(in)Color
1.53 ± 1.63 (0.060 ± 0.064)Yellow
1.72 ± 1.82 (0.068 ± 0.072)Red
1.91 ± 2.01 (0.075 ± 0.079)Black
2.10 ± 2.20 (0.083 ± 0.087)Natural
2.29 ± 2.39 (0.090 ± 0.094)Green
2.48 ± 2.58 (0.098 ± 0.102)Blue
FOLLOWING THE PROCEDURE SHOULD RE-
SULT IN FINAL END±PLAY FROM 0.1 mm TO 0.8
mm (0.004 in TO 0.03 in)
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35. Install selective washer (32).
NOTE: Use petroleum jelly to hold selective washer in
place.
36. Install gasket (33).
37. Install converter housing and oil pump assembly (34)
to adapter case.

Fit and tighten seven outer 13 mm screws.
Torque: 39 Nwm (4.0 kg´m/29 lb ft)

7A±53 AUTOMATIC TRANSMISSION (4L30±E)

Ensure free rotation of pump using 5±8840±2273±0
(J±23082±01) oil pump rotation tool.
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38. Overdrive clutch end play measurement.
1. Fit 5±8840±2271±0 (J±25022) and
5±8840±0618±0 (J±24773±1) turbine shaft puller
on turbine shaft.
2. Position axial play checking tool on converter
housing mating face.
3. Pull turbine shaft upwards with puller until first
resistance is met. (due to weight of overdrive
assembly).
4. Maintain shaft in this position and set indicator to
zero.
5. Pull turbine shaft further upwards with puller.
Read end play shown on indicator.
End play: 0.1mm ± 0.8mm (0.004 in ± 0.031in)6. Remove axial play checking tool and puller.
NOTE: If end play is not correct, repeat selective washer
selection.
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39. Inspect extension housing oil seal and replace if
necessary, using 5±8840±2282±0 (J±36797)
extension housing oil seal installer.

Rotate transmission to horizontal position, with
valve body side down.

Inspect parking wheel seal ring. Replace if
necessary.

Install wheel parking lock assembly (35).
40. Install speed wheel (36) and snap ring (37).
NOTE: Use extra long, needle-nose pliers.
41. Install gasket onto extension assembly with a thin
coating of oil.

Install extension housing assembly (38), and align
parking pawl shaft.

Install actuator assembly into extension assembly.

Install seven 8 mm hexagon socket head screws.
Torque: 32 Nwm (3.3 kg´m/24 lb ft)
42. Inspect speed sensor O±ring. Replace if necessary.

Install speed sensor assembly (39) and 10 mm
screw.
Torque: 9 Nwm (0.9 kg´m/78 lb in)

7A±55 AUTOMATIC TRANSMISSION (4L30±E)
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46. Install two check balls (44).
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47. Inspect main case electrical connector and seal,
replace if necessary.

Install electrical 4 pin connector/main case and
wiring harness.
48. Install two 5±8840±0022±0 (J±25025±B) guide pins
into main case.

Install main case valve body complete assembly
(45) and manual valve link.NOTE: Valve must be extended as the short end of
manual valve link is connected to the range selector lever.
Long end of link goes into valve.

Install seven 13 mm screws.
Torque: 20 Nwm (2.0 kg´m/15 lb ft)

Pass ground wire of adapter case wiring harness
assembly through the hole joining adapter fluid area
and main case fluid area.

Assemble 8.5 mm connector of ground wire under
the head of this valve body bolt and reinstall it.

Remove two guide pins.
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49. Install servo cover gasket, cover (46) and four 13 mm
screws.
Torque: 25 Nwm (2.6 kg´m/18 lb ft)
50. Connect wiring harness (47) to band control, shift
solenoids, and main case 4 pin connector.
51. Install manual detent roller and spring assembly (48)
with clip.

Install two 13 mm screws.
Torque: 20 Nwm (2.0 kg´m/15 lb ft)
52. Install oil filter (49), and three 13 mm screws.
Torque: 20 Nwm (2.0 kg´m/15 lb ft)
53. Install oil pan gasket, magnet, main oil pan (50), and
sixteen 10 mm screws.
Torque: 11 Nwm (1.1 kg´m/96 lb in)
54. Inspect adapter case electrical connector and seal.
Replace if necessary.

Install electrical five pin connector and harness
assembly (52) in bottom of adapter case.
55. Install gasket, transfer plate, and gasket.

Install adapter case valve body (51) and seven 13
mm screws.
Torque: 20 Nwm (2.0 kg´m/15 lb ft)

7A±56
AUTOMATIC TRANSMISSION (4L30±E)
56. Connect wiring harness harness assembly (52) to
converter clutch solenoid, force motor, and 5 pin
connector.
57. Install oil pan gasket, adapter case oil pan (53), and
twelve 10 mm screws.
Torque: 11 Nwm (1.1 kg´m/96 lb in)

Rotate transmission, with bottom pan facing down.
58. Install mode switch (54), two 10 mm screws, selector
lever nut, and cover.
10 mm screw
Torque: 13 Nwm (1.3 kg´m/113 lb in)
Nut
Torque: 23 Nwm (2.3 kg´m/17 lb ft)

Adjust using setting tool, refer to Mode Switch in
this section.
59. Install O±ring (55) on turbine shaft.60. Install torque converter (56)
The converter assembly must be replaced under any
of the following conditions:
a. Evidence of damage to the pump assembly.
b. Metal particles are found after flushing the cooler
lines.
c. External leaks in hub weld area.
d. Converter pilot broken, damaged, or poor fit into
crankshaft.
e. Converter hub scored or damaged.
f. Internal failure in stator.
g. Contamination from engine coolant.
h. Excess end play.

Rotate transmission, bell housing up. Spin
converter to insure proper fit.
61. Fill transmission through the overfill screw hole of oil
pan, using ATF DEXRON)±III. Refer to Changing
Transmission Fluid in this section.
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