Isuzu Trooper (1998-2002 year). Manual — part 725

AUTOMATIC TRANSMISSION (AW30-40LE)

7A–97

DISASSEMBLY OF MAJOR COMPONENTS (3)

248L100001

Disassembly steps

▲

1.

Oil pump

▲

2.

Race

▲

3.

OD planetary gear and OD direct clutch

▲

4.

Race

▲

5.

OD planetary ring gear

▲

6.

Snap ring

▲

7.

Flange, plate and disc

▲

8.

Bearing and race

▲

9.

Snap ring

▲

10.

OD support

▲

11.

Race

▲

12.

Snap ring

▲

13.

Second coast brake piston assembly

▲

14.

Direct clutch and forward clutch

▲

15.

E-ring and pin

▲

16.

Second coast brake band

▲

17.

Front planetary ring gear

▲

18.

Bearing and race

▲

19.

Race

▲

20.

Snap ring

▲

21.

Front planetary gear

▲

22.

Drum and one-way clutch

▲

23

Snap ring

▲

24.

Flange, plate and disc

▲

25.

Snap ring

▲

26.

Rear planetary gear, second brake drum
and output shaft

▲

27.

Bearing

7A–98

AUTOMATIC TRANSMISSION (AW30-40LE)

241RY00003

241RY00002

252L100001

252L100017

Important operations

1. Oil pump

Remove seven bolts fixing the oil pump to the transmission
case.
Remove the oil pump.

2. Race

Remove race from oil pump.

3. OD planetary gear and OD direct clutch

Remove the overdrive planetary gear and overdrive direct
clutch with thrust needle bearing from the transmission
case.

4. Race

Remove the race from OD planetary gear.

AUTOMATIC TRANSMISSION (AW30-40LE)

7A–99

252RY00002

252RY00003

244RY00001

246RY00001

5. OD planetary ring gear

Remove the overdrive planetary ring gear from the
transmission case.

Check piston stroke of overdrive brake

Place a dial indicator onto the overdrive brake piston as
shown in the figure.

Measure the stroke applying and releasing the compressed
air (4– 8kg/cm

2

, 57– 114 psi or 392– 785kPa) as shown in

the figure.

mm (in.)

If the values are nonstandard, select another flange.

6. Snap ring

Remove the snap ring.

Piston stroke

1.40–1.70

(0.0551–0.0669)

Available flange sizes

mm (in.)

3.3 (0.130)

3.8 (0.150)

3.5 (0.138)

3.9 (0.154)

3.6 (0.142)

4.0 (0.158)

3.7 (0.146)

7A–100

AUTOMATIC TRANSMISSION (AW30-40LE)

246RY00026

247RY00003

246RY00002

252RY00004

7. Flange, plate and disc

Remove two flanges, three plates and four discs.

8. Bearing and race

Remove the thrust bearing and two races.

9. Snap ring

Using snap ring pliers, remove the snap ring.

10. OD support

Remove two bolts fixing the overdrive support assembly to
the case.