Subaru Impreza 2003 Service Manual page 2033

5) Remove the drive pinion shaft assembly, and
then check tooth contact. If it is inaccurate, adjust
the backlash or thickness of shim.
• 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
Corrective action: Verify the backlash again, and
then adjust it.
DRIVE PINION SHAFT ASSEMBLY
(A)
AT-00207
AT-00208
AT-01253
6MT-103
MANUAL TRANSMISSION AND DIFFERENTIAL
• Flank contact
Checking item: Backlash is too small.
Contact pattern
Corrective action: Verify the backlash again, and
then adjust it.
• Toe contact (Inside end contact)
Checking item: Contact areas is small.
Contact pattern
Corrective action: Reduce thickness of drive pinion
shim in order to move drive pinion away from crown
gear.
AT-00209
AT-01254
AT-00210
AT-00213