Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 348

AUTOMATIC TRANSMISSION (AW30-40LE) 7A-241

247RY00043

Disassembly steps

1. Thrust bearing and race

Remove assembled bearing and race from
transmission case.

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Check first and reverse brake piston movement

Make sure that first and reverse brake piston moves
smoothly when applying and releasing the compressed
air into the transmission case.

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2. Snap ring

Set special tool on the spring retainer, and compress
the return spring.
Spring compressor: 5-8840-0254-0 (J-25048)
Remove the snap ring with snap ring pliers.

3. Piston return spring

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4. First and reverse brake piston No.2

Holding the first and reverse brake piston No.2 by
hand, apply compressed air to the transmission case to
remove the first and reverse brake piston No.2.
Remove the first and reverse brake piston No.2.
If the piston does not pop out with compressed air, lift
the piston out with needle-nose pliers.

5. O-ring

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6. Reaction sleeve

Insert special tool behind the reaction sleeve and
gradually lift it out of the transmission case.
Reaction sleeve puller: 5-8840-2173-0 (J-37236)

7. O-ring

7A-242 AUTOMATIC TRANSMISSION (AW30-40LE)

247RY00044

8. First and reverse brake piston No.1

Insert special tool behind the first and reverse brake
piston No.1 and gradually lift it out of the transmission
case.
Piston puller: 5-8840-2174-0 (J-37237)

9. O-ring

AUTOMATIC TRANSMISSION (AW30-40LE) 7A-243

REASSEMBLY

246RY00025

Reassembly steps

1. O-ring
2. O-ring
3. First and reverse brake piston No.1
4. O-ring
5. Reaction

sleeve

6. First and reverse brake piston No.2
7. Return

spring

8. Snap

ring

9. Thrust bearing and race

7A-244 AUTOMATIC TRANSMISSION (AW30-40LE)

246RY00018

Reassembly steps

1. O-ring

Coat three new O-rings with ATF.
Install the two O-rings on the No.1 piston.

2. O-ring

Install the O-ring on the reaction sleeve.

3. First and reverse brake piston No.1

Install the first and reverse brake piston No.1 to the
reaction sleeve.

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4. O-ring

Coat a new O-ring with ATF and install it on the first
and reverse brake piston No.2.

5. Reaction sleeve

Install the first and reverse brake piston No.1 with
reaction sleeve onto the first and reverse brake piston
No.2.

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6. First and reverse brake piston No.2

Align the teeth of the first and reverse brake piston
No.2 into the proper grooves.
Being careful not to damage the O-rings, press in the
first and reverse brake piston No.2 with No.1 into the
transmission case.

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7. Return spring

Place piston return spring onto first and reverse brake
piston No.2.

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8. Snap ring

Set special tool as shown, and compress the return
spring with special tool.
Spring compressor: 5-8840-0254-0 (J-25048)
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.