Subaru IMPREZA GD 2007 Series Manual page 3003

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MANUAL TRANSMISSION AND DIFFERENTIAL
5) Remove the drive pinion shaft assembly, and in-
spect the mating condition of the teeth. If the mat-
ing is not correct, change shim thickness to adjust
backlash.
• Correct tooth contact
Check item: Tooth contact surface is slightly
shifted toward the toe side under a no-load con-
dition. (When driving, it moves towards the heel
side.)
(A) Toe side
(B) Heel side
• Face contact
Check item: Backlash is too large.
Contact pattern
Corrective action: Reconfirm and adjust backlash.
Drive Pinion Shaft Assembly
(A)
(B)
MT-01401
AT-00208
AT-01253
6MT-98
• Flank contact
Check item: Backlash is too small.
Contact pattern
Corrective action: Reconfirm and adjust backlash.
• Toe contact (inside contact)
Check item: Teeth contact area is too small.
Contact pattern
Corrective action: Reduce the thickness of the
drive pinion shim according to the procedure for
moving the drive pinion away from the driven gear.
AT-00209
AT-01254
AT-00210
AT-00213