Opel Frontera UBS. Manual - part 2570

AUTOMATIC TRANSMISSION (AW30-40LE)

7A–143

248RY00003

248RY00042

248RY00031

248RY00043

6. Snap ring

Place special tool on the spring retainer and compress the
return spring. Using snap ring pliers, remove the snap ring.
Spring compressor : 5–8840–0254–0 (J–25048)

8. 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 piton.

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.

Check forward clutch drum bushing

Using a dial indicator, measure the inside diameter of the
forward clutch drum bushing.

If the inside diameter is greater than the maximum, replace
the forward clutch drum.

mm (in.)

Maximum inside diameter

24.08 (0.948)

7A–144

AUTOMATIC TRANSMISSION (AW30-40LE)

248RY00045

247RY00034

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.

Check piston return spring

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

mm (in.)

Standard length

19.47 (0.7665)

AUTOMATIC TRANSMISSION (AW30-40LE)

7A–145

REASSEMBLY

248RY00064

Reassembly steps

▲

 1. Thrust bearing

▲

 2. Oil seal ring

▲

 3. O-ring

▲

 4. O-ring

▲

 5. Forward clutch piston

▲

 6. Piston return spring

▲

 7. Snap ring

▲

 8. Cushion plate

▲

 9. Disc and plate

▲

 10. Flange

▲

 11. Snap ring

▲

 12. Race

▲

 13. Thrust bearing

7A–146

AUTOMATIC TRANSMISSION (AW30-40LE)

248RY00044

248RY00046

248RY00047

248RY00049

Important operations

1. 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.

2. 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.

3. O-ring

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

4. O-ring

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

5. Forward clutch piston

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

Assembled bearing and race (Reference) mm (in.)

Inside diameter

33.7 (1.327)

Outside diameter

47.8 (1.882)