ISUZU AXIOM 2002 Service Repair Manual

7A±57 AUTOMATIC TRANSMISSION (4L30±E)
23. Remove selective thrust washer (25).
241RW004
24. Remove fourth clutch retainer (26).
25. Grasp turbine shaft and lift out the overrun clutch
housing assembly (27) and fourth clutch plates (28).
26. Remove thrust bearing assembly (29).
27. Remove overdrive internal gear (30).28. Remove thrust washer (31).
252RS001
29. Remove adapter case and center support assembly
(with fourth clutch piston) (32).
30. Remove seal ring (33).
31. Remove selective thrust washer (34) and two O±ring
seals (35) from main case.
32. Use J±23327 and J±23327±90 compressor to
compress the fourth clutch spring retainer and
springs (37).

Release snap ring (36) from groove.

Remove clutch compressor and snap ring (36).
33. Remove retainer and spring assembly (37).
34. Insert two converter housing/main case screws to
hold adapter case while pulling out fourth clutch
piston (38).

Remove fourth clutch piston assembly (38) from the
adapter case.

Remove converter housing/main case screws.
35. Grasp intermediate shaft, twist and pull out the
second and third clutch drum assemblies with reverse
clutch plates (39) while holding onto output shaft.

7A±58
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).
242RS003
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.
249RS004
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 (16 lb ft)

7A±59 AUTOMATIC TRANSMISSION (4L30±E)
249RS005
5. Rotate main case to vertical position, extension end
facing down.

Install brake band assembly (3).
NOTE: Be sure to align servo pin area with the servo hole.
6. Install thrust bearing (4).
NOTE: The case bushing acts as a guide for the thrust
bearing.
7. Install brake drum (5).
8. Install reaction sun gear (6).
9. Install needle bearing (7).
10. Inspect planetary carrier assembly (8) for wear and
damage. If necessary replace it.

Measure pinion end play clearance with a feeler
gauge.
Clearance: 0.13mm±0.89mm (0.005 in±0.035 in)
If clearance is outside specified value, replace the
planetary carrier assembly.
248RS001
11. Install the thrust bearing (9) on the output shaft.
NOTE: Use petroleum jelly to hold the thrust bearing in
place.
12. Align planetary pinions. Each pinion is marked with
double points to indicate the master tooth space and
exactly opposite with a single point to indicate the
master tooth. The markings on the planetary carrier
consist of double lines which are to be lined up with
the double points on two opposite pinions; the single
lines are to be lined up with the single points on the
other two pinions.

After all four pinions are lined up, slide on the third
clutch assembly. Rotate third clutch and check
mark alignment. Considering that the ring gear
tooth between the double points of one planetary
pinion is tooth number 1, count the teeth to check
that the single points on the two adjacent pinions
are between teeth 23 and 24 of the ring gear, and
that the ring gear tooth between the double points of
the opposite pinion is tooth number 46. If the ring
gear and pinions are not lined up, remove, and
realign them.
13. Install planetary carrier (8) with third clutch (12).
NOTE: Do not force. When properly aligned, the parts will
fit together easily.
248RS002
14. Remove the third clutch (12).
15. Install bearing (11) and washer (10).

7A±60
AUTOMATIC TRANSMISSION (4L30±E)
NOTE: Use petroleum jelly to hold the washer and
bearing in place.
242RW002
16. Carefully align the second clutch plate inner tangs.

Install thrust washer, tangs pointing downward, and
locating tang positioned in slot on second clutch
hub.
NOTE: Use petroleum jelly to hold thrust washer in place.
17. Install third clutch and intermediate shaft assembly
(13) into the second clutch drum (14).18. Install second and third clutch assemblies into the
main case. Twist output shaft and clutch assemblies
to ensure proper fit.
247RS001
19. Install pressure plate (15) with lip side up, tang facing
valve body face.
20. Install reverse clutch plates. Start with a steel plate
(17) and alternate with a lined plate (16).
21. Install waved clutch plate (18) with center tang facing
valve body side.
247RS002

7A±61 AUTOMATIC TRANSMISSION (4L30±E)
22. Second clutch end play measurement
1. Install the J±23085±A Selective washer gauging
tool (with spacer ring) on the case flange and
against the intermediate shaft.
2. Position the inner shaft of the gauging tool against
the thrust surface of the second clutch hub.
3. Tighten thumb screw. Remove the tool.
4. Fit the spacer ring on the inner shaft of the tool.
5. Measure the gap, and select the appropriate
washer as shown in the chart.
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
RESULT IN FINAL END±PLAY FROM 0.36 mm TO
0.79 mm (0.014 in TO 0.031 in)
247R100001
247RS004
23. Inspect fourth clutch piston seals and replace if
necessary.

Lubricate J±38554 fourth clutch piston fitter and
install it on fourth clutch piston (19).

Install fourth clutch piston (19) in adapter case (20).

Remove fitter.
252RS003

7A±62
AUTOMATIC TRANSMISSION (4L30±E)
24. Install retainer and spring assembly (22) into fourth
clutch piston (21).
25. Install snap ring (23) in adapter case.

Install J±23327 and J±23327±90 fourth clutch
spring compressor.

Seat snap ring in groove.

Remove compressor.
252RW002
252RS004
26. Install selective washer using petroleum jelly.
27. Install two O±ring seals (24) in main case and adapter
case/main case seal ring (25).
28. Install J±38588 guide pins.

Install adapter case and center support assembly to
main case.
242RS004
29. Install thrust washer (26) into adapter case, with
tangs pointing downwards.
30. Preassemble overdrive internal gear (27) and thrust
bearing assembly (28) onto the turbine shaft and
overrun clutch assembly.
NOTE: Install bearing assembly, black side up. Use
petroleum jelly to keep assembly in place.
31. Install overdrive carrier (30) and internal gear
assembly into adapter case.
32. Install fourth clutch plates (29) in the following order:
Steel, Lined, Steel, Steel, Lined, Steel. Steel plates
go in with short tang facing towards valve body
surface.

7A±63 AUTOMATIC TRANSMISSION (4L30±E)
33. Install fourth clutch retainer (31) with the notch facing
up and positioned towards valve body surface.
252RW004
34. Overdrive clutch end play measurement
1. Install the 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
RESULT IN FINAL END±PLAY FROM 0.1 mm TO
0.8 mm (0.004 in TO 0.03 in)
252RS005
252RS006
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 (29 lb ft)

7A±64
AUTOMATIC TRANSMISSION (4L30±E)

Ensure free rotation of oil pump using J±23082±01
oil pump rotation tool.
241RW010
38. Overdrive clutch end play measurement
1. Fit J±25022 and 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.
252RW001
39. Inspect extension housing oil seal and replace if
necessary, using 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). (4y4)
NOTE: Use extra long, needle-nose pliers.
41. Install flange, O±ring and nut. (4y2)
42. 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 (24 lb ft)

7A±65 AUTOMATIC TRANSMISSION (4L30±E)
43. Inspect speed sensor O±ring. Replace if necessary.

Install speed sensor assembly (39) and 10 mm
screw.
Torque: 9 Nwm (78 lb in)
241RW013
241RS004
44. Main case end play measurement
1. Attach axial play checking tool on the extension
housing and set indicator to zero on output shaft.
2. Manually push output shaft upwards.
End play: 0.36mm ± 0.80mm (0.014 in ± 0.031in)
3. Remove axial play checking tool.
4. If end play is not correct, repeat selective washer
selection.
241RS005
45. Inspect servo piston seal ring. Replace if necessary.

Ensure brake band is correctly positioned. Rotate
output shaft if necessary.

Install J±38428 servo piston fitter in servo bore.

Install apply rod (40), round end toward band, return
spring (41) and piston assembly (42).
46. Install the J±23075 servo spring compressor with
offset to rear of case.

Compress servo piston seal ring, using fitter while
tightening the tool screw.

Install servo piston retaining ring (43).

Remove tool.

Adjust the brake band by tightening the servo
adjusting screw to 4.5 N´m (39.8 lb in) torque. Be
certain the lock nut is loose, then back±off the
screw five turns exactly. Hold piston sleeve with
wrench and tighten lock nut to 18.5 N´m (13.6 lb ft)
torque. Be certain the adjusting screw does not
turn.

7A±66
AUTOMATIC TRANSMISSION (4L30±E)
242RW004
47. Install two check balls (44).
244RW002
48. Inspect main case electrical connector and seal,
replace if necessary.

Install electrical 7 way connector/main case and
wiring harness.
49. Install two 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 (15 lb ft)

Remove two guide pins.
50. Install servo cover gasket, cover (46) and four 13 mm
screws.
Torque: 25 Nwm (18 lb ft)
51. Connect wiring harness (47) to band control, shift
solenoids, and main case 7 way connector.
52. Install manual detent roller and spring assembly (48)
with clip.

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

Install electrical 4 way connector and harness
assembly (52) in bottom of adapter case.
56. Install gasket, transfer plate, and gasket.

Install adapter case valve body (51) and seven 13
mm screws.
Torque: 20 Nwm (15 lb ft)
57. Connect wiring harness harness assembly (52) to
converter clutch PWM solenoid, force motor, and 4
way connector.
58. Install oil pan gasket, adapter case oil pan (53), and
twelve 10 mm screws.
Torque: 11 Nwm (96 lb in)

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

Adjust using setting tool, refer to
Mode Switch in
this section.
60. Install O±ring (55) on turbine shaft.
61. 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.