Opel Frontera UBS. Service 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)
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