Jeep Liberty KJ. Manual — part 281
INSTALLATION
1. Apply a coat of grease supplied with the joint/boot
to the C/V joint components before assembling
them.
2. Place new clamps on the new boot and slide boot
down the shaft.
3. Slide cage (2) onto the shaft (1) with the small
diameter (3) end towards the boot.
4. Install the inner race (1) onto the shaft (3). Pull on
the race to verify snap ring has engaged.
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HALF SHAFT
KJ
5. Align cage (1) with the inner race (2) and slide over
the race.
6. Turn the cage 30° to align the cage windows (4)
with the race (2).
7. Apply grease to the inner race and bearings and
install the bearings.
8. Apply grease to the housing bore (4) then install
the bearing assembly (2) into the housing (1).
9. Install the housing snap ring (3) and verify it is
seated in the groove.
10. Fill the housing and boot with the remaining
grease.
11. Slide the boot onto the C/V housing into it’s orig-
inal position. Ensure boot is not twisted and
remove any excess air.
12. Secure both boot clamps with Clamp Installer
C-4975A. Place tool on clamp bridge and tighten
tool until the jaws of the tool are closed.
KJ
HALF SHAFT
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FRONT AXLE - 186FIA
TABLE OF CONTENTS
page
page
FRONT AXLE - 186FIA
FRONT AXLE - 186FIA . . . . . . . . . . . . . . . . . . . . . . 31
PINION DEPTH-BEARING PRELOAD-GEAR
BACKLASH.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
FRONT AXLE - 186FIA . . . . . . . . . . . . . . . . . . . . . . 49
SPECIAL TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
COVER-DIFFERENTIAL
SHAFT-AXLE
SEAL-AXLE SHAFT
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
BEARING-AXLE
SEAL-PINION
DIFFERENTIAL
BEARING-DIFFERENTIAL CASE
GEAR-PINION/RING
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FRONT AXLE - 186FIA
KJ
FRONT AXLE - 186FIA
DIAGNOSIS AND TESTING
FRONT AXLE - 186FIA
GEAR NOISE
Axle gear noise can be caused by insufficient lubricant, incorrect backlash, tooth contact, worn/damaged gears or
the carrier housing not having the proper offset and squareness.
Gear noise usually happens at a specific speed range. The noise can also occur during a specific type of driving
condition. These conditions are acceleration, deceleration, coast, or constant load.
When road testing, first warm-up the axle fluid by driving the vehicle at least 5 miles and then accelerate the vehicle
to the speed range where the noise is the greatest. Shift out-of-gear and coast through the peak-noise range. If the
noise stops or changes greatly check for:
•
Insufficient lubricant.
•
Incorrect ring gear backlash.
•
Gear damage.
Differential side and pinions gears, usually do not cause noise during straight-ahead driving, when the gears are
unloaded. The side gears are loaded during turns. A worn pinion mate shaft can also cause a snapping or a knock-
ing noise.
BEARING NOISE
Bearing noise can be either a whining or a growling sound.
Pinion bearings have a constant high pitch noise, because it rotates at a faster rate. This noise changes with
vehicle speed. If noise is heard under a load, the rear pinion bearing is the source. If noise is heard during a coast,
the front pinion bearing is the source.
Differential bearings usually produce a low pitch noise. The differential bearing noise is constant and varies only
with vehicle speed.
Axle shaft bearing noise generally changes when the bearings are loaded. Turn vehicle sharply to the left and the
right during a road test. This will load and unload the bearings and change the noise level. If axle bearing damage
is slight, the noise is usually not noticeable at speeds above 30 m.p.h.
LOW SPEED KNOCK
Low speed knock is generally caused by:
•
Worn U-joints/CV joint.
•
Worn side-gear thrust washers.
•
Worn pinion shaft bore.
VIBRATION
Vibration at the rear of the vehicle is usually caused by:
•
Damaged drive shaft.
•
Missing drive shaft balance weight(s).
•
Worn or out-of-balance wheels.
•
Loose wheel lug nuts.
•
Worn U-joints/CV joint.
•
Loose/broken springs.
•
Damaged axle shaft bearing(s).
•
Loose pinion gear nut.
•
Excessive pinion yoke run out.
•
Bent axle shaft(s).
Check for loose or damaged front-end components or engine/transmission mounts. These components can contrib-
ute to what appears to be an axle vibration. Also look at engine accessories, brackets and drive belts.
KJ
FRONT AXLE - 186FIA
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