Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 398

7A-140 AUTOMATIC TRANSMISSION (AW30-40LE)

252RY00029

Check OD direct clutch piston

Check that the check ball is free by shaking the piston.
Check that the valve does not leak by applying low-
pressure compressed air.

252RY00030

Check OD direct clutch drum bushings

Using a dial indicator, measure the inside diameter of
the OD direct clutch drum bushings.
Maximum inside diameter: 27.5 mm (1.083 in)
If the inside diameter is greater than the maximum,
replace the OD direct clutch drum.

252RY00031

Check OD planetary gear bushing

Using a dial indicator, measure the inside diameter of
replace the OD planetary gear bushing.
Maximum inside diameter: 11.27 mm (0.4437 in)
If the inside diameter is greater than the maximum,
replace the OD planetary gear.

AUTOMATIC TRANSMISSION (AW30-40LE) 7A-141

REASSEMBLY

252R200006

Reassembly steps

1. OD planetary gear assembly
2. Thrust

washer

3. OD one-way clutch
4. Retaining

plate

5. Snap

ring

6. Race
7. OD planetary ring gear
8. Ring gear flange
9. Snap

ring

10. Thrust bearing
11. O-ring
12. OD direct clutch piston with O-ring
13. Piston return spring
14. Snap ring
15. Flange, disc and plate
16. Snap ring
17. Thrust bearing
18. OD direct clutch assembly

7A-142 AUTOMATIC TRANSMISSION (AW30-40LE)

252RY00032

Reassembly steps

1. OD planetary gear assembly
2. Thrust washer

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

252RY00033

3. OD one-way clutch

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

252RY00026

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

252RY00024

4. Retaining plate
5. Snap ring

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

6. Race

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

Race diameter (Reference)

Inside diameter

27.3 mm (1.075 in)

Outside diameter

41.8 mm (1.646 in)

252RY00034

AUTOMATIC TRANSMISSION (AW30-40LE) 7A-143

252RY00023

7. OD planetary ring gear
8. Ring gear flange

Install ring gear flange to OD planetary ring gear.

252RY00022

9. Snap ring

Install snap ring, using a screwdriver.

10. Thrust bearing

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

Race and bearing diameter (Reference)

Inside

Outside

Race

24.2 mm (0.953 in) 47.8 mm (1.882 in)

Bearing

26.0 mm (1.024 in) 46.8 mm (1.843 in)

252RY00035

252RY00036

11. O-ring

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

12. 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.

252RY00037

13. Piston return spring

Install piston return spring.