TROUBLESHOOTING GUIDE

M-4spec table

REAR AXLE (Cont'd)

Rear axle troubleshooting (continued)

Problem	Possible Cause	Action	Page
Body "rolls"	Worn or deteriorated upper arm bushing	Replace	M-12, Section R
Body leans	Weak upper arm bushing	Replace	M-12, Section R
Abnormal noise from suspension system	Worn or deteriorated upper arm bushing	Replace	M-12, Section R

Body "rolls"

Possible CauseWorn or deteriorated upper arm bushing

ActionReplace

PageM-12, Section R

Body leans

Possible CauseWeak upper arm bushing

ActionReplace

PageM-12, Section R

Abnormal noise from suspension system

Possible CauseWorn or deteriorated upper arm bushing

ActionReplace

PageM-12, Section R

DIFFERENTIAL, STANDARD

Standard differential troubleshooting

Problem	Possible Cause	Action	Page
Abnormal noise	Insufficient differential oil	Add oil	M-24
Abnormal noise	Incorrect differential oil	Replace	M-24
Abnormal noise	Improperly adjusted ring gear backlash	Adjust	M-40
Abnormal noise	Poor contact of ring gear teeth	Adjust	M-41
Abnormal noise	Worn or damaged side bearing	Replace	M-32
Abnormal noise	Worn or damaged ring gear	Replace	M-32
Abnormal noise	Worn or damaged drive pinion bearing	Replace	M-32
Abnormal noise	Worn or damaged pinion and side gear	Replace	M-32
Abnormal noise	Seized side gear and case	Replace	M-32
Abnormal noise	Worn side gear spline	Replace	M-32
Abnormal noise	Worn pinion shaft	Replace	M-32
Abnormal noise	Worn thrust washer	Replace	M-32
Abnormal noise	Improperly adjusted side gear backlash	Adjust	M-40
Abnormal noise	Improperly adjusted drive pinion gear preload	Adjust	M-38
Heat buildup	Insufficient differential oil	Add oil	M-24
Heat buildup	Insufficient gear backlash	Adjust	M-40
Heat buildup	Excessive bearing preload	Adjust	M-38,40
Oil leakage	Excessive differential oil	Remove oil	M-24
Oil leakage	Loose differential carrier	Tighten or repair	M-42
Oil leakage	Worn or damaged oil seal	Replace	M-32
No differential operation	Misassembled	Repair	M-32

Abnormal noise

Possible CauseInsufficient differential oil

ActionAdd oil

PageM-24

Abnormal noise

Possible CauseIncorrect differential oil

ActionReplace

PageM-24

Abnormal noise

Possible CauseImproperly adjusted ring gear backlash

ActionAdjust

PageM-40

Abnormal noise

Possible CausePoor contact of ring gear teeth

ActionAdjust

PageM-41

Abnormal noise

Possible CauseWorn or damaged side bearing

ActionReplace

PageM-32

Abnormal noise

Possible CauseWorn or damaged ring gear

ActionReplace

PageM-32

Abnormal noise

Possible CauseWorn or damaged drive pinion bearing

ActionReplace

PageM-32

Abnormal noise

Possible CauseWorn or damaged pinion and side gear

ActionReplace

PageM-32

Abnormal noise

Possible CauseSeized side gear and case

ActionReplace

PageM-32

Abnormal noise

Possible CauseWorn side gear spline

ActionReplace

PageM-32

Abnormal noise

Possible CauseWorn pinion shaft

ActionReplace

PageM-32

Abnormal noise

Possible CauseWorn thrust washer

ActionReplace

PageM-32

Abnormal noise

Possible CauseImproperly adjusted side gear backlash

ActionAdjust

PageM-40

Abnormal noise

Possible CauseImproperly adjusted drive pinion gear preload

ActionAdjust

PageM-38

Heat buildup

Possible CauseInsufficient differential oil

ActionAdd oil

PageM-24

Heat buildup

Possible CauseInsufficient gear backlash

ActionAdjust

PageM-40

Heat buildup

Possible CauseExcessive bearing preload

ActionAdjust

PageM-38,40

Oil leakage

Possible CauseExcessive differential oil

ActionRemove oil

PageM-24

Oil leakage

Possible CauseLoose differential carrier

ActionTighten or repair

PageM-42

Oil leakage

Possible CauseWorn or damaged oil seal

ActionReplace

PageM-32

No differential operation

Possible CauseMisassembled

ActionRepair

PageM-32

DIFFERENTIAL, VISCOUS LIMITED SLIP

Viscous limited slip differential troubleshooting

Problem	Possible Cause	Action	Page
Abnormal noise	Insufficient differential oil	Add oil	M-24
Abnormal noise	Incorrect differential oil	Replace	M-24
Abnormal noise	Improperly adjusted ring gear backlash	Adjust	M-40
Abnormal noise	Poor contact of ring gear teeth	Adjust	M-41
Abnormal noise	Worn or damaged viscous limited slip differential oil seal	Replace	M-24,32
Abnormal noise	Worn or damaged ring gear	Replace	M-32
Abnormal noise	Worn or damaged drive pinion bearing	Replace	M-32
Heat buildup	Insufficient differential oil	Add oil	M-24
Heat buildup	Excessive bearing preload	Adjust	M-38,40
Oil leakage	Excessive differential oil	Remove oil	M-24
Oil leakage	Loose differential carrier	Tighten or repair	M-42
Oil leakage	Worn or damaged oil seal	Replace	M-24,32
No differential operation	Misassembled	Repair	M-32