1998 OPEL FRONTERA automatic transmission

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 retur n spring
4. Snap ring
5. Disc and plate
6. Flange
7. Snap ring.
8. Clutch drum thrust washer (plastic)

7A–138 AUTOMATIC TRANSMISSION (AW30-40LE)
248RY00033
248RY00034
248RY00002
248RY00062
Important operations
1. O-ring
Coat new O-rings with ATF and install them on the direct
clutch piston.
2. Direct clutch piston
Install direct clutch piston to direct clutch drum.
Being careful not to damage the O-rings, press in the direct
clutch piston into the clutch drum, using both hands.
3. Piston return spring
Install piston return spring.
4. Snap ring
Compress piston return spring and install snap ring in
groove.
Place special tool and a suitable ring on the spring retainer,
and compress the return spring.
Install the snap ring with snap ring pliers. Be sure the end
gap of the snap ring is not aligned with the spring retainer
claw.
Spring compressor: 5-8840-0254-0 (J-25048)
5. Disc and plate
Install plates and discs.
Install in order: P– D– P– D– P– D– P– D– P– D
P: Plate, D: Disc

AUTOMATIC TRANSMISSION (AW30-40LE) 7A–139
248RY00035
248RY00036
248RY00029
248RY00061
6. Flange
Install the flange, with the flat side facing downward.
7. Snap ring
Install the snap ring with a screwdriver. Be sure the end
gap of the snap ring is not aligned with the cutout portion of
the direct clutch drum.
Check piston stroke of direct clutch (C-2)
Place the direct clutch assembly onto the OD suppor t
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.
If the piston stroke is not within specification, replace the
discs and recheck the piston stroke.
If the piston stroke is non standard, select another flange.
There are eight flanges.mm (in.)
Piston stroke1.6– 1.9
(0.0630– 0.0748)
mm (in.)
No. Flange thickness No. Flange thickness
33 3.3 (0.130) 37 3.7 (0.146)
34 3.4 (0.134) 38 3.8 (0.150)
35 3.5 (0.138) 39 3.9 (0.154)
36 3.6 (0.142) 40 4.0 (0.158)

7A–140 AUTOMATIC TRANSMISSION (AW30-40LE)
248RY00037
248RY00038
8. Clutch drum thrust washer (plastic)
Coat the thrust washer with petroleum jelly and install it onto
the direct clutch.
NOTE:
Make sure that the lugs fit into the cutout portions on the
direct clutch.
Install direct clutch assembly
Align the flukes of discs in the direct clutch.
Install the direct clutch assembly onto the forward clutch
assembly.
Check that the distance from the direct clutch end to the
forward clutch end is 71.2 mm (2.803 in.).

AUTOMATIC TRANSMISSION (AW30-40LE) 7A–141
FORWARD CLUTCH ASSEMBLY (C-1)
DISASSEMBLY
248RY00063
Disassembly steps
1. Thrust bearing
2. Race
3. Snap ring
4. Flange
5. Disc and plate
6. Snap ring
7. Piston return spring
8. Piston
9. O-ring
10. O-ring
11. Oil seal ring
12. Thrust bearing

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 suppor t 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)