Isuzu Trooper (2000 year). Service manual — part 381

7A–44

AUTOMATIC TRANSMISSION (4L30–E)

Installation

1. Use J–36797 extension housing oil seal installer, and

install the rear oil seal to the transmission extension
housing.

2. Install the transfer case assembly (4

×

4) or extension

assembly (4

×

2) 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:

D

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

D

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

D

When assembling the components, apply
DEXRON



–III Automatic Transmission Fluid (ATF)

to each seal, rotating part, and sliding part.

D

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).

D

Drain fluid from torque converter.

D

Attach J–8763–02 holding fixture to the
transmission and set it on J–3289–20 holding
fixture base.

NOTE: Do not overtighten the tool, as case damage may
result.

420RW021

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 4 way connector of adapter case. Pull
on connectors only, not on wiring harness.

6. Remove seven 13mm adapter case valve body (6)

fixing screws, adapter case valve body assembly,
transfer plate, and two gaskets.

D

Remove wiring harness and 4 way 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 7 way
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.

D

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

D

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).

D

Remove 7 way connector.

D

Remove gasket transfer plate from main case.

7A–45

AUTOMATIC TRANSMISSION (4L30–E)

13. Remove two check balls (13) from main case.

240RY001

14. Turn transmission to vertical position to drain fluid.

Return back to horizontal position when drained.

D

Install J–23075 servo piston spring compressor
with offset to the rear of case.

D

Compress servo piston assembly.

D

Remove servo piston retaining ring (14).

D

Slowly release servo piston assembly (15).

D

Remove tool.

7A–46

AUTOMATIC TRANSMISSION (4L30–E)

15. Remove servo piston assembly (15), return spring

(16), and servo apply rod (17).

242RS002

16. Rotate transmission to horizontal position, pan side

down.

D

Remove one 10mm screw, and speed sensor (18)
with “O” 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).

241RS002

21. Rotate transmission to vertical position, converter

housing up.

D

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.

D

Remove seven outer screws.

D

Remove converter housing and oil pump assembly
(23).

22. Remove gasket (24).

7A–47

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).

D

Release snap ring (36) from groove.

D

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).

D

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

D

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 while holding onto output shaft (39).