FRONT AXLES
DIAGNOSIS
CONDITION
POSSIBLE CAUSES
CORRECTION
WHEEL NOISE
1. Wheel loose.
1. Tighten loose nuts.
2. Faulty, brinelled wheel bearing.
2. Faulty or brinelled bearings must be
replaced.
AXLE SHAFT NOISE
1. Misaligned axle shaft tube.
1. Inspect axle shaft tube alignment. Correct as
necessary.
2. Bent or sprung axle shaft.
2. Replace bent or sprung axle shaft.
3. End play in drive pinion bearings.
3. Refer to Drive Pinion Bearing Pre-Load
Adjustment.
4. Excessive gear backlash between ring gear
and pinion gear.
4. Check adjustment of ring gear backlash and
pinion gear. Correct as necessary.
5. Improper adjustment of drive pinion gear
shaft bearings.
5. Adjust drive pinion shaft bearings.
6. Loose drive pinion gearshaft yoke nut.
6. Tighten drive pinion gearshaft yoke nut with
specified torque.
7. Improper wheel bearing adjustment.
7. Readjust as necessary.
8. Scuffed gear tooth contact surfaces.
8. If necessary, replace scuffed gears.
AXLE SHAFT BROKE
1. Misaligned axle shaft tube.
1. Replace broken axle shaft after correcting
axle shaft tube alignment.
2. Vehicle overloaded.
2. Replace broken axle shaft. Avoid excessive
weight on vehicle.
3. Erratic clutch operation.
3. Replace broken axle shaft after inspecting for
other possible casues. Avoid erratic use of
clutch.
4. Grabbing clutch.
4. Replace broken axle shaft. Inspect clutch and
make necessary repairs or adjustments.
DIFFERENTIAL CASE
CRACKED
1. Improper adjustment of differential bearings.
1. Replace cracked case; examine gears and
bearings for possible damage. At reassembly,
adjust differential bearings properly.
2. Excessive ring gear backlash.
2. Replace cracked case; examine gears and
bearings for possible damage. At reassembly,
adjust ring gear backlash properly.
3. Vehicle overloaded.
3. Replace cracked case; examine gears and
bearings for possible damage. Avoid excessive
weight on vehicle.
4. Erratic clutch operation.
4. Replace cracked case. After inspecting for
other possible causes, examine gears and
bearings for possible damage. Avoid erratic use
of clutch.
DIFFERENTIAL GEARS
SCORED
1. Insufficient lubrication.
1. Replace scored gears. Scoring marks on the
drive face of gear teeth or in the bore are
caused by instantaneous fusing of the mating
surfaces. Scored gears should be replaced. Fill
rear differential housing to required capacity
with proper lubricant. Refer to Specifications.
2. Improper grade of lubricant.
2. Replace scored gears. Inspect all gears and
bearings for possible damage. Clean and refill
differential housing to required capacity with
proper lubricant.
3. Excessive spinning of one wheel/tire.
3. Replace scored gears. Inspect all gears,
pinion bores and shaft for damage. Service as
necessary.
LOSS OF LUBRICANT
1. Lubricant level too high.
1. Drain excess lubricant by removing fill plug
and allow lubricant to level at lower edge of fill
plug hole.
3 - 18
DIFFERENTIAL AND DRIVELINE
ZG
DIAGNOSIS AND TESTING (Continued)
Summary of Contents for 1997 Grand Cherokee
Page 6: ...FASTENER IDENTIFICATION 4 INTRODUCTION ZG GENERAL INFORMATION Continued ...
Page 9: ...METRIC CONVERSION ZG INTRODUCTION 7 GENERAL INFORMATION Continued ...
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Page 286: ...7 12 COOLING SYSTEM ZG DIAGNOSIS AND TESTING Continued ...
Page 290: ...SERPENTINE DRIVE BELT DIAGNOSIS 7 16 COOLING SYSTEM ZG DIAGNOSIS AND TESTING Continued ...
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Page 423: ...VIC Initial Set Up ZG INSTRUMENT PANEL SYSTEMS 8E 21 SERVICE PROCEDURES Continued ...
Page 424: ...VIC Reset 8E 22 INSTRUMENT PANEL SYSTEMS ZG SERVICE PROCEDURES Continued ...
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Page 1655: ...Fig 3 Oil Lubrication System ZG 5 2L ENGINE 9 57 DESCRIPTION AND OPERATION Continued ...
Page 1684: ...TORQUE 9 86 5 2L ENGINE ZG SPECIFICATIONS Continued ...
Page 1689: ...Fig 3 Oil Lubrication System ZG 5 9L ENGINE 9 91 DESCRIPTION AND OPERATION Continued ...
Page 1723: ...DIAGNOSIS AND TESTING SERVICE DIAGNOSIS DIESEL PERFORMANCE ZG ENGINE 9 3 ...
Page 1724: ...9 4 ENGINE ZG DIAGNOSIS AND TESTING Continued ...
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Page 2122: ...DIAGNOSIS AND TESTING NV231 DIAGNOSIS 21 8 TRANSMISSION AND TRANSFER CASE ZG ...