Subaru 2009 IMPREZA Service Manual page 1951

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8) Measure the dimension "B" of the drive pinion

ST 398643600

B Measured value

9) Calculate the thickness "t" mm (in) of the drive

pinion shim.

t = 6.5 0.0625 (0.256 0.0025) – (B – A)

10) Select three or less shims from following table.

Drive pinion shim

E: INSPECTION

• Make sure that all component parts are free of

scratches, holes and other faults.

• Adjust the tooth alignment. <Ref. to 4AT-95, AD-

JUSTMENT, Drive Pinion Shaft Assembly.>

Drive Pinion Shaft Assembly

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)

AUTOMATIC TRANSMISSION

F: ADJUSTMENT

1) Remove the liquid gasket from the mating sur-

face completely.

2) Install the oil pump housing assembly to the con-

verter case, and secure them by tightening the four

bolts evenly.

Use an old gasket or aluminum washer to prevent

damaging the mating surface of the housing.

Tightening torque:

41 N·m (4.2 kgf-m, 30.2 ft-lb)

3) Rotate the drive pinion a few times using ST1

ST1 498937110

ST2 499787700

4) Adjust the drive pinion and hypoid driven gear

backlash. <Ref. to 4AT-102, ADJUSTMENT, Front

Differential Assembly.>