Lincoln Aviator: Rear Drive Axle/Differential / Description and Operation - Rear Drive Axle and Differential
The 8.8-inch ring gear open rear differential axle has 3.31 gear ratio versions.
Rear Drive Axle and Differential
The rear axle assembly consists of the following:
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Integral-type housing hypoid gear design (center of the pinion set below the centerline of the ring gear)
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Hypoid differential ring gear and pinion consisting of a
8.8-inch ring gear and an overhung drive pinion that is supported by 2
opposed tapered roller bearings
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Cast center section with a cast aluminium differential housing cover
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Differential housing cover using silicone rubber based sealant as a gasket
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Differential pinion shaft that is retained by a roll pin attached to the differential case
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Differential case that is mounted in the rear axle
housing between 2 opposing differential bearings that are retained in
the rear axle housing by 2 removable bearing caps
-
Differential ring gear backlash which is adjusted by
differential bearing shims that are located between the differential
bearing cups and the rear axle housing
The
rear drive axle receives rotational torque from the driveshaft. The
direction of the rotation determines movement of the vehicle. The
rotation enters the rear drive axle through the drive pinion, turning
the drive pinion and rotating the ring gear. The ring gear is welded to
the differential case. The differential case houses the pinion shaft
upon which the differential pinion gears ride. The pinion gears are in
mesh with the differential side gears to which the axle shafts are
splined. It is the unique arrangement of the differential that allows
the axle shafts to be driven at different speed when needed, such as
when driving around corners.
This
is an open differential. It has the normal internal spider gear design
that will allow a speed differential between the rear wheels when
cornering. The open differential has the ring gear integrated with
differential carrier assembly.
Capacities
Item
Specification
Material: Motorcraft® SAE 75W-85 Premium Synthetic Hypoid Gear Lubricant
/ XY-75W85-QL
(WSS-M2C942-A)
1...
Preliminary Inspection
Visually inspect the housing, seals, drive pinion stem for obvious signs of mechanical damage.
If an obvious cause for an observed or reported concern is
found, correct the cause (if possible) before proceeding to the next
step
If the cause is not visually evident, verify the symptom and REFER to Symptom Chart: NVH...
Other information:
Removal
NOTE:
LH (left-hand) side shown, RH (right-hand) side similar.
NOTE:
Removal steps in this procedure may contain installation details.
Remove the rear door window regulator and motor.
Refer to: Rear Door Window Regulator and Motor (501-11 Glass, Frames and Mechanisms, Removal and Installation)...
Apply the parking brake.Note: If vehicle battery is dead, for
example,
no electrical power is available, you could
require an external power source to apply
the parking brake.
Using the key or a flat head screwdriver
4.7 in (120 mm), carefully open the access
cover under the arm rest console...