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REAR AXLES
3 - 7
SERVICE DIAGNOSIS (CONT'D)
Condition
Possible Cause
Correction
AXLE OVERHEATING
GEAR TEETH BROKE
(RING GEAR AND
PINION)
AXLE NOISE
(b) Worn axle shaft seals.
(c) Cracked differential housing.
(d) Worn drive pinion gear shaft seal.
(e) Scored and worn yoke.
(f) Axle cover not properly sealed.
(a) Lubricant level too low.
(b) Incorrect grade of lubricant.
(c) Bearings adjusted too tight.
(d) Excessive gear wear.
(e) Insufficient ring gear backlash,
(a) Overloading.
(b) Erratic clutch operation.
(c) Ice-spotted pavements.
(d) Improper adjustments.
(a) Insufficient lubricant.
(b) Improper ring gear and drive pinion
gear adjustment.
(c) Unmatched ring gear and drive
pinion gear.
(d) Worn teeth on ring gear or drive
pinion gear.
(e) Loose drive pinion gear shaft bearings.
(f) Loose differential bearings.
(g) Misaligned or sprung ring gear.
(h) Loose differential bearing cap bolts.
(b) Replace worn seals.
(c) Repair or replace housing as
necessary.
(d) Replace worn drive pinion gear shaft
seal.
(e) Replace worn or scored yoke and seal,
(t) Remove cover and clean flange and
(a) Refill differential housing.
(b) Drain, flush and refill with correct
amount of the correct lubricant.
(c) Readjust bearings.
(d) Inspect gears for excessive wear or
scoring. Replace as necessary.
(e) Readjust ring gear backlash and
inspect gears for possible scoring.
(a) Replace gears. Examine other gears
and bearings for possible damage.
Replace parts as needed. Avoid
overloading of vehicle.
(b) Replace gears and examine the
remaining parts for possible damage.
Avoid erratic clutch operation.
(c) Replace gears. Examine the remaining
parts for possible damage. Replace
parts as required.
(d) Replace gears. Examine other parts for
possible damage. Ensure ring gear
backlash is correct.
(a) Refill axle with correct amount of the
proper lubricant. Also inspect for leaks
and correct as necessary.
(b) Check ring gear and pinion gear teeth
contact pattern.
(c) Remove unmatched ring gear and
drive pinion gear. Replace with
matched gear and drive pinion gear
set.
(d) Check teeth on ring gear and drive pi-
nion gear for correct contact.
If necessary, replace with new
matched set.
(e) Adjust drive pinion gearshaft bearing
preload torque.
(f) Adjust differential bearing preload
torque.
(g) Measure ring gear runout.
(h) Tighten with specified torque.
J9003-50
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