7F-2 DIFFERENTIAL (REAR)
GENERAL DESCRIPTION
The differential assembly using a hypoid bevel pinion and gear is installed to the rear axle. It is set in the convention-
al type axle housing.
The differential assembly is decisive in that the drive power is concentrated there. Therefore, use of genuine parts
and specified torque is compulsory. Further, because of sliding tooth meshing with high pressure between bevel
pinion and gear, it is mandatory to lubricate them by hypoid gear oil.
DIAGNOSIS
DIAGNOSIS TABLE
Condition Possible Cause Correction
Gear noise
Deteriorated or water mixed lubricant Repair and replenish.
Inadequate or insufficient lubricant Repair and replenish.
Maladjusted backlash between drive bevel pinion and gear Adjust as prescribed.
Improper tooth contact in the mesh between drive bevel
pinion and gear
Adjust or replace.
Loose drive bevel gear securing bolts Replace or retighten.
Damaged differential gear(s) or differential pinion(s) Replace.
Bearing noise
(Constant noise) Deteriorated or water mixed lubricant Repair and replenish.
(Constant noise) Inadequate or insufficient lubricant Repair and replenish.
(Noise while coasting) Damaged bearing(s) of drive bevel
pinion
Replace.
(Noise while turning) Damaged differential side bearing(s) or
axle bearing(s)
Replace.
Oil leakage
Clogged breather plug Clean.
Worn or damaged oil seal Replace.
Excessive oil Adjust oil level.
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