Opel Frontera UBS. Service manual — part 1473
7A–134
AUTOMATIC TRANSMISSION (AW30-40LE)
248RY00028
248RY00029
248RY00061
248RY00002
Important operations
Remove direct clutch drum assembly from forward clutch
assembly.
Check piston stroke of direct clutch (C-2)
Place the direct clutch assembly onto the OD support
assembly.
Using a dial indicator, measure the direct clutch piston
stroke by applying and releasing compressed air (4– 8 kg/
cm
2
, 57– 114 psi or 392– 785 kPa) as shown.
5. Snap ring
Place special tool and a suitable ring 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)
mm (in.)
Piston stroke
1.6– 1.9
(0.0630– 0.0748)
AUTOMATIC TRANSMISSION (AW30-40LE)
7A–135
248RY00030
247RY00034
252RY00027
248RY00031
7. Direct clutch piston
Place the direct clutch drum onto the OD support.
Holding the direct clutch piston by hand, apply compressed
air to the OD support to remove the direct clutch piston.
Remove the direct clutch piston.
Remove two O-ring from piston.
INSPECTION AND REPAIR
Check piston return spring
Using calipers, measure the free length of the return spring.
Check discs
Using a micrometer, measure the thickness of the discs.
If the thickness is less than the minimum, replace the disc.
Check direct 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.
mm (in.)
Standard
21.3 (0.839)
mm (in.)
Minimum thickness
1.84 (0.0724)
7A–136
AUTOMATIC TRANSMISSION (AW30-40LE)
248RY00032
Check direct clutch drum bushing
Using a dial indicator, measure the inside diameter of the
clutch drum bushing.
If the inside diameter is grater than maximum, replace the
clutch drum.
mm (in.)
Maximum inside diameter
53.99 (2.1256)
AUTOMATIC TRANSMISSION (AW30-40LE)
7A–137
REASSEMBLY
248RY00060
Reassembly steps
▲
1. O-ring
▲
2. Direct clutch piston
▲
3. Piston return spring
▲
4. Snap ring
▲
5. Disc and plate
▲
6. Flange
▲
7. Snap ring.
▲
8. Clutch drum thrust washer (plastic)
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