Isuzu Trooper (1998-2002 year). Manual - part 731

AUTOMATIC TRANSMISSION (AW30-40LE)

7A–121

252RY00032

252RY00033

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Important operations

1. Thrust washer

Install the thrust washer to the OD planetary gear, facing
the grooved side upward.

2. OD one-way clutch

Install the one-way clutch into the outer race, with the
flanged side of the one-way clutch facing upward.

Install OD one-way clutch with outer race to overdrive
planetary gear.

3. Retaining plate

4. Snap ring

Install retaining plate, then install snap ring, using a
screwdriver.

7A–122

AUTOMATIC TRANSMISSION (AW30-40LE)

252RY00034

252RY00023

252RY00022

252RY00035

5. Race

Coat the race with petroleum jelly and install it to the
planetary gear.

6. Ring gear flange

Install ring gear flange to OD planetary ring gear.

7. Snap ring

Install snap ring, using a screwdriver.

8. Thrust bearing

Coat the race and bearing with petroleum jelly and install
them onto the OD planetary ring gear.

Race diameter (Reference) 

  mm (in.)

Inside diameter

27.3 (1.075)

Outside diameter

41.8 (1.646)

Race and bearing diameter (Reference)

mm (in.)

Inside

Outside

Race

24.2 (0.953)

47.8 (1.882)

Bearing

26.0 (1.024)

46.8 (1.843)

AUTOMATIC TRANSMISSION (AW30-40LE)

7A–123

252L100011

252L100012

252L100007

252L100013

9. O-ring

Coat new O-rings with ATF and install them on the OD
direct clutch piston.

10. OD direct clutch piston with O-ring

Being careful not to damage the O-rings, press in the OD
direct clutch piston into the clutch drum, using both hands.

11. Piston return spring

Install piston return spring.

12. Snap ring

Place special tool and a suitable ring on the spring retainer,
and compress the return spring.
Spring compressor: 5-8840-0195-0 (J-23327-1)
Install the snap ring with snap ring pliers. Be sure the end
gap of the snap ring is not aligned with the spring retainer
claw.

13. Flange, disc and plate

Install two plates and two discs then install the flange, with
the flat side facing downward.

7A–124

AUTOMATIC TRANSMISSION (AW30-40LE)

252L100014

252L100005

252L100016

14. Snap ring

Install snap ring.

Check piston stroke of OD direct clutch (C-0).
Place the oil pump onto the torque converter, and then
place the OD direct clutch assembly onto the oil pump.

Using a dial indicator, measure the OD direct clutch piston
stroke by applying and releasing the compressed air (4– 8
kg/cm

2

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

If the piston stroke is not within specification, replace the
disc and recheck the piston stroke.
If the piston stroke is non standard, select another flange.
There are six flange sizes.

mm (in.)

Piston stroke mm (in.)

1.85– 2.15

(0.0728– 0.0847)

mm (in.)

No.

Flange thickness

No.

Flange thickness

16

3.6 (0.142)

19

3.3 (0.130)

17

3.5 (0.138)

20

3.2 (0.126)

18

3.4 (0.134)

21

3.1 (0.122)