Opel Frontera UBS. Manual - part 2574

AUTOMATIC TRANSMISSION (AW30-40LE)

7A–159

246RY00007

247RY00001

246RY00008

247RY00034

Important operations

1. Second brake assembly

Remove second brake assembly from output shaft.

2. 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.

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.

INSPECTION AND REPAIR

Check piston return spring

Using calipers, measure the free length of the return
spring.

mm (in.)

Standard length

16.05 (0.6319)

7A–160

AUTOMATIC TRANSMISSION (AW30-40LE)

REASSEMBLY

246RY00023

Reassembly steps

▲

 1. O–ring

▲

 2. Second brake piston

▲

 3. Piston sleeve

▲

 4. Piston return spring

▲

 5. Spring retainer

▲

 6. Snap ring

▲

 7. Thrust washer (Plastic)

▲

 8. Second brake assembly

AUTOMATIC TRANSMISSION (AW30-40LE)

7A–161

246RY00009

246RY00010

247RY00001

246RY00011

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.

7A–162

AUTOMATIC TRANSMISSION (AW30-40LE)

246RY00012

246RY00014

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.