Subaru Legacy 2002 Service Manual page 2006

20) Checking and adjusting tooth contact of crown gear
(1) Apply an even coat of red lead on both sides of three or four teeth on the crown gear. Check the
contact pattern after rotating crown gear several revolutions back and forth until a definite contact pat-
tern appears on the crown gear.
(2) When the contact pattern is incorrect, readjust according to the instructions given in "TOOTH CON-
TACT PATTERN".
NOTE:
Be sure to wipe off red lead completely after adjustment is completed.
Condition
Correct tooth contact
Tooth contact pattern slightly shifted
towards toe under no load rotation.
(When loaded, contact pattern moves
toward heel.)
Face contact
Backlash is too large.
Flank contact
Backlash is too small.
Toe contact
Contact area is small.
Heel contact
Contact area is small.
: Adjusting direction of drive pinion
: Adjusting direction of crown gear
REAR DIFFERENTIAL FOR T-TYPE
TOOTH CONTACT PATTERN
Contact pattern
This may cause noise and chipping at
tooth ends.
This may cause noise and stepped wear
on surfaces.
This may cause chipping at toe ends.
This may cause chipping at heel ends.
DI-37
Adjustment
G3M0098A
Increase thickness of drive pinion height
adjusting shim in order to bring drive pin-
ion closer to crown gear center.
G3M0098B
Reduce thickness of drive pinion height
adjusting shim in order to move drive
pinion away from crown gear.
G3M0098C
Adjust as for flank contact.
G3M0098D
Adjust as for face contact.
G3M0098E
Differentials
—
G3M0098F
G3M0098G
G3M0098G
G3M0098F