Daewoo KORANDO Service Manual page 886

3A-22 FRONT DRIVE AXLE
Inspection of Ring Gear Tooth Contact Pattern
Normal Contact
Apply gear-marking compound (prussian blue / red lead) on
the ring gear teeth. Rotate the ring gear and check the tooth
contact pattern.
Abnormal Contact
Tooth Contact pattern
1. Heel Contact
2. Toe Contact
3. Face Contact
4. Flank Contact
Possible Cause
Excessive backlash (little)
Noise can be occurred
Insufficient backlash (little)
Tooth can be damaged
or broken under heavy
load
Excessive backlash (much)
Drive pinion shaft is apart
from the ring gear
Noise can be occurred
Insufficient backlash (much)
Gear contacts on the low
flank
Gear can be damaged or
worn
Noise can be occurred
Remedy
Adjust backlash(Decrease backlash)
Select proper shim(s) to move the
drive pinion toward the ring gear
(toward toe)
Adjust backlash(Increase backlash)
Select proper shim(s) to move the
drive pinion against the ring gear
(toward heel)
Adjust backlash(Increase pinion shim)
Move the drive pinion toward the ring
gear (toward center of ring gear)
Adjust backlash(Decrease pinion shim)
Move the ring gear toward the drive
pinion (toward ring gear center line)