Page 209 of 4264
REAR AXLE 4B-45
Checkpoint Trouble Cause Countermeasure
Replace the drive pinion and
the ring gear as a setExcessive ring gear run-out
Replace the drive pinion and
the ring gear as a setDrive pinion and/or ring gear
damage
NG NGDrive pinion and ring gear Continued from the previous page
Replace the drive pinion and
the ring gear as a setWorn drive pinion and ring
gear NG
2) Noise when the Vehicle is Coasting
Checkpoint Trouble Cause Countermeasure
Replace the ring gear and the
pinion as a setRing gear damaged
Adjust the backlashInsufficient backlash
OK
Ring gearNG NG
Drive pinion and ring gear
backlash
Page 210 of 4264
4B-46 REAR AXLE
3) Intermittent Noise
Checkpoint Trouble Cause Countermeasure
Axle case inside
Ring gear
Remove the foreign material
Replace the drive pinion and
the ring gear as a set
Foreign material in the axle
case
Warped ring gear
Differential cageTighten the differential cage
bolts
Replace the shaft
Loose differential cage bolts
Too much spline play
OK
NG NG NG NO
OK OKAxle shaft
Page 211 of 4264
REAR AXLE 4B-47
4) Noise when the Vehicle is Turning
Checkpoint Trouble Cause Countermeasure
Differential cross pin
Side gear
Replace the differential cross
pin
Replace the side gear
Worn differential cross pin
Worn side gear
Differential pinionReplace the differential pinion
Replace the rear axle shaft
Worn differential pinion
Worn rear axle shaft splines
OK
NG NG NG NO
OK OKRear axle shaft
Page 212 of 4264
4B-48 REAR AXLE
5) Constant Noise
Checkpoint Trouble Cause Countermeasure
Replace the rear axle shaftBent rear axle shaft NG
Replace the side bearing
Replace the drive pinion
bearing
Replace the drive pinion and
the ring gear as a set
Replace the drive pinion and
the ring gear as a set
Flat spot on the side bearing
oil seal
BearingFlat spot on the drive pinion
Flat spot on the gear teeth
pilot bearing wear
Drive pinionFlat spot on the drive pinion
gear teeth
Ring gear
Replace the drive pinion and
the ring gear as a setWorn pinion splines oil seal
NG NG NG NG NG
OK OK
OK
Rear axle shaft
Page 213 of 4264
REAR AXLE 4B-49
2. VIBRATION
Checkpoint Trouble Cause Countermeasure
Replace the rear axle shaftBent rear axle shaft
Replace the rear hub bearingWorn rear hub bearing
OK
Rear axle shaftNG NG
Rear hub bearing
Page 214 of 4264
4B-50 REAR AXLE
3. OIL LEAKAGE
1) Differential Carrier Leakage
Checkpoint Trouble Cause Countermeasure
Correct the oil levelToo much gear oil NG
Reapply the liquid gasket
and/or tighten the lock nut to
the specified torque
Reapply the liquid gasket
Tighten the bolts to the
specified torque
Replace the oil seal
Ring gear thrust boltLoose lock nut and/or liquid
Liquid gasket seal bed
Loose bolts
Oil sealWorn or defective oil seal
Differential carrier
Clean the air breatherAir breatherClogged air breather
NG NG NG NG NG
OK OK OK
OK
Gear oil level
Page 215 of 4264
REAR AXLE 4B-51
2) Axle Case Leakage
Checkpoint Trouble Cause Countermeasure
Tighten the drain plug and/or
replace the gasket(s)Loose drain plug and/or
defective gasket(s) NG
Reapply the liquid gasket
Tighten the bolts to the
specified torque
Clean the air breather
Liquid gasket seal bad
Loose bolts
Air breatherClogged air breather
Differential carrier
Replace the axle caseAxle caseCracked axle case
NG NG NG NG
OK OK
OK
Oil filler and drain plug
Page 216 of 4264
4B-52 REAR AXLE
3) Axle Case to Inside Brake Drum Leakage
Checkpoint Trouble Cause Countermeasure
Replace the oil sealWorn or defective oil seal NGOil seal