Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 341

AUTOMATIC TRANSMISSION (AW30-40LE) 7A-213

248RY00042

9. Piston

Place the forward clutch drum onto the OD support.
Holding the forward clutch piston by hand, apply
compressed air to the OD support to remove the
forward clutch piston.

10. O-ring
11. O-ring
12. Oil seal ring
13. Thrust bearing
14. Forward clutch drum

248RY00031

INSPECTION AND REPAIR

Check forward clutch piston

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

248RY00043

Check forward clutch drum bushing

Using a dial indicator, measure the inside diameter of
the forward clutch drum bushing.
Maximum inside diameter: 24.08 mm (0.948 in)
If the inside diameter is greater then the maximum,
replace the forward clutch drum.

248RY00045

Check disc, plate and flange

Check to see if the sliding surface of the disc, plate and
flange are worn or burnt. If necessary, replace them.

・ If the lining of the disc is peeling off or discolored, or

even if parts of the printed numbers are defaced,
replace all discs.

・ Before assembling new discs, soak them in ATF for

at least fifteen minutes.

7A-214 AUTOMATIC TRANSMISSION (AW30-40LE)

247RY00034

Check piston return spring

Using calipers, measure the free length of the return
spring.
Standard length: 19.47 mm (0.7665 in)

AUTOMATIC TRANSMISSION (AW30-40LE) 7A-215

REASSEMBLY

248R200004

Reassembly steps

1. Forward

clutch

drum

2. Thrust

bearing

3. Oil seal ring
4. O-ring
5. O-ring
6. Forward

clutch

piston

7. Piston

return

spring

8. Snap

ring

9. Cushion

plate

10. Disc and plate

Six discs and six plates (UBS)
Five discs and five plates (TFR/S)

11. Flange
12. Snap ring
13. Race
14. Thrust bearing

7A-216 AUTOMATIC TRANSMISSION (AW30-40LE)

Reassembly steps

1. Forward clutch drum
2. Thrust bearing

Coat the assembled bearing and race with petroleum
jelly and install it onto the forward clutch drum, with the
race side facing downward.

Bearing and race (Reference)

Inside diameter

33.7 mm (1.327 in)

Outside diameter

47.8 mm (1.882 in)

248RY00044

248RY00046

3. Oil seal ring

Coat the three oil rings with ATF.
Contract the oil seal rings as shown, and install three oil
seal rings onto the forward clutch drum.
NOTE:
Do not spread the ring ends more than necessary.

248RY00047

4. O-ring

Coat a new O-ring with ATF and install O-ring on the
forward clutch drum.

5. O-ring

Coat new O-rings with ATF and install two O-rings on
the forward clutch piston.

248RY00049

6. Forward clutch piston

Being careful not to damage the O-rings, press the
forward clutch piston into the forward clutch drum.