Opel Frontera UBS. Service manual — part 2563
AUTOMATIC TRANSMISSION (AW30-40LE)
7A–115
252L100003
252L100004
252L100005
252L100016
Important operations
Check operation of one-way clutch
Hold the OD direct clutch drum and turn the input shaft.
The input shaft should turn freely clockwise and should lock
counterclockwise.
(1): Free
(2): Lock
1. OD direct clutch assembly
Remove OD direct clutch assembly from OD planetary
gear.
2. Thrust bearing
Then remove thrust bearing with the race from OD direct
clutch drum.
Check piston stroke of OD direct clutch (C-O)
Place the oil pump onto the torque converter, and then
place the OD direct clutch assembly onto the oil pump.
Use a dial indicator, measure the OD direct clutch piston
stroke applying and releasing the compressed air (4– 8 kg/
cm
2
, 57– 114 psi, 392– 785 kPa) as shown.
mm (in.)
Piston stroke
1.85– 2.15
(0.0728– 0.0847)
7A–116
AUTOMATIC TRANSMISSION (AW30-40LE)
252L100006
252L100007
252L100008
252ry00021
3. Snap ring
Remove snap ring from clutch drum.
4. Flange, disc and plate
Remove flange, two discs and two plates.
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: 5-8840-0195-0 (J-23327-1)
6. Piston return spring
Remove piston return spring.
7. OD direct clutch piston with O-ring
Place the oil pump onto the torque converter and then
place the OD direct clutch onto the oil pump.
Holding the OD direct clutch piston by hand, apply
compressed air to the oil pump to remove the OD direct
clutch piston.
Remove the OD direct clutch piston.
8. O-ring
Remove two O-rings from piston.
9. Thrust bearing
Remove bearing and race from OD planetary ring gear.
AUTOMATIC TRANSMISSION (AW30-40LE)
7A–117
252RY00022
252RY00023
252RY00024
252RY00025
10. Snap ring
Remove snap ring.
11. Ring gear flange
Remove ring flange from OD planetary ring gear.
13. Snap ring
Remove snap ring, using screwdriver.
14. Retaining plate
Remove retaining plate from OD planetary gear.
7A–118
AUTOMATIC TRANSMISSION (AW30-40LE)
252RY00026
252RY00027
252RY00028
252RY00029
15. OD one-way clutch
Remove OD one-way clutch with outer race.
INSPECTION AND REPAIR
Check discs
Using a micrometer, measure the thickness of the discs.
If the thickness is less than the minimum, replace the disc.
Check piston return spring
Using calipers, measure the free length of the return spring.
Check OD 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.)
Minimum thickness
1.84 (0.0724)
mm (in.)
Standard length
15.8 (0.622)
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