Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 954
REAR AXLE 4B-53
1. ABNORMAL REAR AXLE NOISE
1) Noise when the Engine is Driving the Vehicle
Checkpoint
Trouble Cause
Countermeasure
Replenish the gear oil
Insufficient gear oil
NG
Differential side bearing
Adjust the differential side
bearing preload
Replace the drive pinion
bearings
Adjust the drive pinion bearing
preload
Replace the gear oil
Loose differential side
bearings
Worn drive pinion bearings
Loose drive pinion bearings
Wrong or poor grade gear oil
Drive pinion to ring gear
backlash
Drive pinion end play
Adjust the backlash
Too much or too little backlash
Continued on the next page
OK
OK
NG
NG
NG
NG
NG
OK
OK
Rear axle gear oil
Replace the differential side
bearings
Worn differential side bearings
NG
4B-54 REAR AXLE
Checkpoint
Trouble Cause
Countermeasure
Replace the drive pinion and
the ring gear as a set
Excessive ring gear run-out
Replace the drive pinion and
the ring gear as a set
Drive pinion and/or ring gear
damage
NG
NG
Drive pinion and ring gear
Continued from the previous page
Replace the drive pinion and
the ring gear as a set
Worn 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 set
Ring gear damaged
Adjust the backlash
Insufficient backlash
OK
Ring gear
NG
NG
Drive pinion and ring gear
backlash
REAR AXLE 4B-55
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 cage
Tighten the differential cage
bolts
Replace the shaft
Loose differential cage bolts
Too much spline play
OK
NG
NG
NG
NO
OK
OK
Axle shaft
4B-56 REAR AXLE
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 pinion
Replace the differential pinion
Replace the rear axle shaft
Worn differential pinion
Worn rear axle shaft splines
OK
NG
NG
NG
NO
OK
OK
Rear axle shaft
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