Subaru Impreza 2003 Service Manual page 1641

10) Select three or less shims from following table.
Available drive pinion shims
Part No.
31451AA050
31451AA060
31451AA070
31451AA080
31451AA090
31451AA100
E: INSPECTION
• Make sure that all component parts are free of
harmful cuts, gouges, and other faults.
• Adjust the teeth alignment. <Ref. to 4AT-109,
ADJUSTMENT, Drive Pinion Shaft.>
F: ADJUSTMENT
1) Thoroughly remove the liquid gasket from the
case mating surface beforehand.
2) Install the oil pump housing assembly to the
torque converter clutch case, and secure evenly by
tightening four bolts.
NOTE:
Use an old gasket or an aluminum washer so as not
to damage the mating surface of the housing.
Tightening torque:
41 N·m (4.2 kgf-m, 30.4 ft-lb)
3) Rotate the drive pinion several times with ST1
and ST2.
ST1 498937110 HOLDER
ST2 499787700 WRENCH
DRIVE PINION SHAFT
Thickness mm (in)
0.150 (0.0059)
0.175 (0.0069)
0.200 (0.0079)
0.225 (0.0089)
0.250 (0.0098)
0.275 (0.0108)
AT-00205
ST2
ST1
AT-00206
4AT-109
AUTOMATIC TRANSMISSION
4) Adjust the backlash between drive pinion and
crown gear. <Ref. to 4AT-116, ADJUSTMENT,
Front Differential.>
5) Apply red lead evenly to the surfaces of three or
four teeth of the crown gear. Rotate the drive pinion
in the forward and reverse directions several times.
Then remove the oil pump housing, and check the
tooth contact pattern.
If tooth contact is improper, readjust the backlash
or shim thickness.<Ref. to 4AT-116, ADJUST-
MENT, Front Differential.>
• Tooth contact
Checking item:Tooth contact pattern is slightly
shifted toward to toe side under no-load
rotation. [When loaded, contact pattern moves
toward heel.]
(B)
(A) Toe side
(B) Heel side
• Face contact
Checking item: Backlash is too large.
Contact pattern
(A)
AT-00207
AT-00208