Isuzu Trooper (1998-2002 year). Manual - part 741

AUTOMATIC TRANSMISSION (AW30-40LE)

7A–161

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Important operations

1. O–ring

Coat new O–ring with ATF and install them on the second
brake piston.

2. Second brake piston

Being careful not to damage the O–rings, press in the
second brake piston into the second brake drum.

3. Piston sleeve

Install piston sleeve.

4. Piston return spring

Install piston return spring.

5. Spring retainer

Install spring retainer.

6. Snap ring

Place special tool on the spring retainer, and compress the
return spring.
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.

Check second brake piston movement

Make sure the second brake piston moves smoothly when
applying and releasing the low compressed air to the
second brake drum.

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AUTOMATIC TRANSMISSION (AW30-40LE)

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7. Thrust washer (Plastic)

Coat the thrust washer with petroleum jelly and install it to
the second brake piston, with the grooved side facing
upward.

NOTE:  
Make sure that the cutout portions of the thrust washer
match the teeth of the spring retainer.

8. Second brake assembly

Install second brake assembly to output shaft.

AUTOMATIC TRANSMISSION (AW30-40LE)

7A–163

REAR PLANETARY GEAR ASSEMBLY AND OUTPUT SHAFT

DISASSEMBLY

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Disassembly steps

1. Second brake assembly

2. Output shaft

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 3. Oil seal ring

 4. Disc, plate and flange

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 5. Rear planetary gear assembly

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 6. One–way clutch inner race

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 7. Snap ring

 

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 8. One–way clutch

9. Thrust washer (Plastic)

10. Thrust washer (Plastic)

11. Thrust bearing and race

12. Snap ring

13. Ring gear flange

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Important operations

3. Oil seal ring

Remove oil seal ring from output shaft.

5. Rear planetary gear assembly

Remove rear planetary gear from rear planetary ring gear.

Check operation of No.2 one–way clutch

Hold the planetary gear and turn the one–way clutch inner
race. The one–way clutch inner race should turn freely
counterclockwise and should lock clockwise.
(1) : Lock
(2) : Free

6. One–way clutch inner race

Remove the one–way clutch inner race from the rear
planetary gear.