|
Symptom
or trouble
|
Possible
cause
|
Remedy
|
1. Oil leakage
|
(1) Worn,
scratched, or incorrectly seated front or side oil seal. Scored,
battered, or excessively worn sliding surface of companion flange.
|
Repair
or replace.
|
(2) Clogged
or damaged air breather.
|
Clean,
repair or replace.
|
(3) Loose
bolts on differential spindle or side retainer, or incorrectly fitted
O-ring.
|
Tighten
the bolts to specified torque. Replace the O-ring.
|
(4) Loose
rear cover attaching bolts or damaged gasket.
|
Tighten
the bolts to specified torque. Replace the gasket and apply liquid
packing.
|
(5) Loose
oil filler or drain plug.
|
Retighten
and apply liquid packing.
|
(6) Wear,
damage or incorrectly fitting for spindle, side retainer and oil
seal.
|
Repair
or replace.
|
2. Seizure
|
Note
|
|
Seized or damaged parts should be
replaced, and also other parts should be thoroughly checked for
any defect and should be repaired or replaced as required.
|
|
(1) Insufficient
backlash for hypoid gear.
|
Readjust
or replace.
|
(2) Excessive
preload for side, rear, or front bearing.
|
Readjust
or replace.
|
(3) Insufficient
or improper oil used.
|
Replace
the seized part and fill with specified oil to specified level.
|
3. Damage
|
Note
|
|
Damaged parts should be replaced,
and also other parts should be thoroughly checked for any defect
and should be repaired or replaced as required.
|
|
(1) Improper
backlash for hypoid gear.
|
Replace.
|
(2) Insufficient
or excessive preload for side, rear, or front bearing.
|
Readjust
or replace.
|
(3) Excessive
backlash for differential gear.
|
Replace
the gear or thrust washer.
|
(4) Loose
bolts and nuts such as hypoid driven gear bolt.
|
Retighten.
|
(5) Damage
due to overloading.
|
Replace.
|
4. Noises when starting or shifting gears
|
Note
|
|
Noises may be caused by differential
assembly, universal joint, wheel bearing, etc. Find out what is
actually making noise before disassembly.
|
|
(1) Excessive
backlash for hypoid gear.
|
Readjust.
|
(2) Excessive
backlash for differential gear.
|
Replace
the gear or thrust washer.
|
(3) Insufficient
preload for front or rear bearing.
|
Readjust.
|
(4) Loose
drive pinion nut.
|
Tighten
to specified torque.
|
(5) Loose
bolts and nuts such as side bearing retainer attaching bolt.
|
Tighten
to specified torque.
|
5. Noises when cornering
|
(1) Damaged
differential gear.
|
Replace.
|
(2) Excessive
wear or damage of thrust washer.
|
Replace.
|
(3) Broken
pinion mate shaft.
|
Replace.
|
(4) Seized
or damaged side bearing.
|
Replace.
|
6. Gear noises
|
Note
|
|
Since noises from engine, muffler,
transmission, propeller shaft, wheel bearings, tires, and body are
sometimes mistaken for noises from differential assembly, be careful
in checking them. Inspection methods to locate noises include coasting,
accelerating, cruising, and jacking-up all four wheels. Perform
these inspections according to condition of trouble. When listening
to noises, shift gears into four wheel drive and fourth speed position,
trying to pick up only differential noise.
|
|
(1) Improper
tooth contact of hypoid gear.
|
Readjust
or replace the hypoid gear set.
|
(2) Improper
backlash for hypoid gear.
|
Readjust.
|
(3) Scored
or chipped teeth of hypoid gear.
|
Replace
the hypoid gear set.
|
(4) Seized
hypoid gear.
|
Replace
the hypoid gear set.
|
(5) Improper
preload for front or rear bearings.
|
Readjust.
|
(6) Seized,
scored, or chipped front or rear bearing.
|
Replace.
|
(7) Seized,
scored, or chipped side bearing.
|
Replace.
|
(8) Vibrating
differential carrier.
|
Replace.
|
