Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual - part 665

7A1 – 160 AUTOMATIC TRANSMISSION (4L30-E)

DISASSEMBLY

During the disassembly and reassembly of the following
components, 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
with new parts.

•

When assembling the components, apply DEXRON



-

III Automatic transmission fluid to each seal, rotating
part and sliding part.

•

Do not dip those parts having a facing, such as drive
plate for clutch or brake, in the cleaner when washing
it with solvent.
Also, always wash it with new ATF two or three times
after cleaning with solvent.

1.

Torque Converter 
1) Drain fluid from torque converter.
2) Attach holding fixture to the transmission and set

it on holding fixture base.

Holding fixture: 5-8840-2278-0 (J-8763-02)
Fixture base: 5-8840-0003-0 (J-3289-20)

NOTE:

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

2.

O-Ring
Remove O-ring from turbine shaft. 

3.

Mode Switch
1) Remove two 10mm screws, cover and mode

switch.

4.

Adapter Case Oil Pan
1) Remove twelve 10mm screws, adapter oil pan,

and gasket.

5.

Wiring Harness
1) Disconnect electrical connections from solenoids.

Pull on connectors only, not on wiring harness.

6.

Adapter Case Valve Body
1) Remove seven 13mm screws, adapter case valve

body assembly, transfer plate and two gaskets.

2) Remove wiring harness and 5 pin connector.

7.

Main Case Oil Pan
Remove sixteen 10mm screws, main oil pan, magnet,
and gasket.

8.

Oil Filter
Remove three 13mm screws, oil filter.

9.

Manual Detent
Remove two 13mm screws, roller & spring and
manual detent.

5-8840-0003-0

5-8840-2278-0

420RW019

AUTOMATIC TRANSMISSION (4L30-E)  7A1 – 161

10. Wiring Harness

1) Disconnect harness assembly from band apply

solenoid, shift solenoids and main case 4 pin
connector.

2) Remove 4 pin connector.

11. Servo Cover

Remove four 13mm screws, servo cover and gasket.

12. Main Case Valve Body and Ground Wire

1) Remove seven 13mm valve body screws.
2) Remove ground wire from main case.
3) Remove main valve body assembly with manual

valve link and transfer plate.

NOTE:

Note the position of link, with the long end into valve
short end, into range selector lever.

3) Remove gasket transfer plate from main case.
4) Remove two check balls from main case. 

13. Servo Piston

1) Turn transmission to vertical position to drain

fluid. Return back to horizontal position when
drained.

2) Install servo piston spring compressor with offset

to the rear of case.

3) Compress servo piston assembly.
4) Remove servo piston retaining ring.
5) Slowly release servo piston assembly.
6) Remove tool.
7) Remove servo piston assembly, return spring,

and servo apply rod.

Servo piston spring compressor: 5-8840-0501-0

(J-23075)

14. Speed Sensor

1) Rotate transmission to horizontal position, pan

side down.

2) Remove one 10mm screw, and speed sensor with

O-ring.

15. Extension Housing and Flange

1) Remove seven 8mm hexagon socket head screws,

extension assembly, and gasket.

2) Remove retaining ring.

NOTE:

Use extra long nose pliers.

3) Remove flange nut.
4) Remove flange and O-ring.
5) Remove speed wheel.
6) Remove wheel parking lock (with seal ring).

15.Wheel parking lock

Seal ring

15.Speed wheel

15.Retaining ring

15.Extension housing

15.Flange

15.Flange nut

14.Speed sensor

241LW001

7A1 – 162 AUTOMATIC TRANSMISSION (4L30-E)

16. Converter Housing and Oil Pump Assembly

1) Rotate transmission to vertical position, converter

housing up.

2) Loosen, but not remove, five 13 mm inner screws

if oil pump disassembly required.

3) Remove seven outer screws.
4) Remove converter housing and oil pump

assembly.

5) Remove gasket.
6) Remove selective thrust washer.

17. Fourth Clutch Retainer

Remove fourth clutch retainer.

18. Turbine Shaft and Clutch Plates

Grasp turbine shaft and lift out the overrun clutch
housing assembly and fourth clutch plates.

19. Thrust Bearing Assembly

Remove thrust bearing assembly.

20. Overdrive Internal Gear

Remove overdrive internal gear.

21. Thrust Washer 

Remove thrust washer.

AUTOMATIC TRANSMISSION (4L30-E)  7A1 – 163

22. Adapter Case and Center Support Assembly

1) Remove adapter case and center support

assembly (with fourth clutch piston).

2) Remove seal ring.
3) Remove selective thrust washer and two O-ring

seals from main case.