Opel Frontera UBS. Service manual — part 1475
7A–142
AUTOMATIC TRANSMISSION (AW30-40LE)
248RY00039
248RY00048
248RY00040
248RY00041
Important operations
Remove forward clutch assembly from direct clutch
assembly.
1. Thrust bearing
Place wooden blocks, etc, to prevent forward clutch shaft
from touching the work stand, and place the OD support on
them.
Place the forward clutch onto the OD support and remove
the bearing and race.
Check piston stroke of forward clutch (C–1)
Using a dial indicator, measure the forward clutch piston
stroke by applying and releasing compressed air (4–8kg/
cm
2
, 57–114psi or 392–785kPa)as shown.
3. Snap ring
Remove snap ring from clutch drum.
mm (in.)
Pack clearance
0.6–1.0 (0.0236–0.0394)
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
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