Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 406

7A-172 AUTOMATIC TRANSMISSION (AW30-40LE)

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Reassembly steps

1. Planetary sun gear
2. Snap ring

Install snap ring to planetary sun gear.

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3. Sun gear input drum

Place a wooden block, etc. as a work stand and place
the planetary sun gear onto it.
Install the sun gear input drum onto the planetary sun
gear.

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4. Snap ring

Install snap ring with snap ring pliers.

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5. Oil seal ring (Metal)

Coat the two oil seal rings with ATF.
Install the two oil seal rings onto the planetary sun gear.
NOTE:
Do not spread the ring ends too much.

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6. Thrust washer (Plastic)

Install thrust washer.
NOTE:
Make sure that the lugs fit into the holes on the sun
gear input drum.

AUTOMATIC TRANSMISSION (AW30-40LE) 7A-173

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7. One-way clutch and second brake hub

Install assembled No.1 one-way clutch and second
brake hub onto planetary sun gear as shown.

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Check operation of No.1 one-way clutch

Hold the planetary sun gear and turn the second brake
hub.
The second brake hub should turn freely clockwise and
should lock counterclockwise.

①: Free

②: Lock

7A-174 AUTOMATIC TRANSMISSION (AW30-40LE)

SECOND BRAKE ASSEMBLY (B-2)

DISASSEMBLY

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Disassembly steps

1. Second brake assembly
2. Thrust washer (Plastic)
3. Snap

ring

4. Spring

retainer

5. Piston

return

spring

6. Piston

sleeve

7. Second brake piston
8. O-ring
9. Second brake drum

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Disassembly steps

1. Second brake assembly

Remove second brake assembly from output shaft.

AUTOMATIC TRANSMISSION (AW30-40LE) 7A-175

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2. Thrust washer (Plastic)
3. Snap ring

Place 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.

4. Spring retainer
5. Piston return spring
6. Piston sleeve

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7. Second brake piston

Holding the second brake piston by hand, apply
compressed air to the second brake drum to remove
the second brake piston.
Remove the second brake piston.

8. O-ring
9. Second brake drum

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INSPECTION AND REPAIR

Check piston return spring

Using calipers, measure the free length of the return
spring.
Standard length: 18.38 mm (0.7236 in)