Front Axle; Axle Noisy On Pull And Coast; Axle Noisy On Pull; Axle Noisy On Coast - Jeep J-10 Series 1982 Technical & Service Manual

2F-2 AXLES - FRONT HUBS
Axle noises may be classified into two types: gear
noise and bearing noise.
Gear noise is often described as a whine or high-
pitched resonating sound. It is usually more pronounced
at certain vehicle speeds and within a narrow speed
range under a drive (accelerating load), coast (deceler
ating load), or float (constant speed) condition.
Axle bearing noise is usually constant and the pitch is
related to vehicle speed.
Since the pinion gear rotates faster than the ring gear,
the pinion bearings produce a higher pitch sound than
the differential bearings. The pinion bearings are usu
ally heard at lower vehicle speeds of 20 to 30 mph (32 to
48 km/h).
Differential bearings produce a lower pitch sound be
cause they are rotating at the same speed as the wheels.
Differential bearing noise will not vary when the vehicle
is turned alternately left and right or when the brakes
are gently applied.
Axle Noisy On Pull and Coast
• Excessive ring and pinion backlash.
• Excessive pinion end play.
• Worn pinion bearings.
• Incorrect pinion depth adjustment.
• Incorrect lubricant (Trac-Lok differential).
Axle Noisy On Pull
•Incorrect ring and pinion backlash or depth
adjustment.
• Damaged or worn pinion bearings.
• Incorrect pinion bearing preload.
AXLE NOISY ON COAST
• Excessive ring and pinion backlash.
• Excessive pinion end play.
• Worn or damaged pinion or differential bearings.
• Excessive differential bearing preload.
Backlash
Excessive driveline backlash may be the result of
backlash in the transmission, transfer case, propeller
shaft yokes or slip joint splines, universal joints, ring
and pinion gears, differential gears, front axle shaft
splines or universal joints, or rear axle shaft splines.
Chatter—Trac-Lok Differential
Trac-Lok chatter is usually caused by using non-rec
ommended lubricants. If chatter occurs, drain and refill
the axle with Jeep Axle lubricant or equivalent only.
Other Axle Conditions
A knocking noise heard at low speed or when coasting
may be caused by loose fitting differential side gears. If
this condition is encountered, operate the vehicle at the
speed where noise is loudest and apply the brakes
lightly. If loose fitting gears are causing the problem,
the noise level will usually decrease when the brakes are
applied.
Differential gear noise is considered normal when
spinning a wheel with an on-the-vehicle wheel balancer,
or when the wheels are spinning on icy or other types of
low traction surface.
Whenever axle noise is caused by worn or damaged
bearings, do not replace the gears unless they are also
worn or damaged. Similarily, if axle gears are causing
noise, do not replace the bearings unless they are worn
or damaged.
FRONT AXLE
Page
Axis Housing Inner Oil Seal
2F-11
Axle Housing Service
2F-4
Axle Identification 2F-3
Axle Installation 2F-12
Axle Removal 2F-11
Axle Shaft 2F-6
Axle Shaft Seal 2F-11
Axle Shaft Universal Joint
2F-7
Front Wheel Alignment
2F-4
GENERAL
A drive-type front axle with steering knuckles and
hypoid differential gears is used on all Jeep models.
Page
General 2F-2
High Steering Effort
2F-4
Pinion Seal and Yoke
2F-5
Specifications
2F-12
Spindle Bearing
2F-11
Steering Knuckle Installation
2F-10
Steering Knuckle Removal
2F-8
Steering Knuckle Ball Studs
2F-8
Turnlno/Angle Adjustment
2F-12
Engine torque is transmitted to the wheels through full
floating, two-piece axle shafts which have connecting
universal joints (fig. 2F-1). The axle shafts revolve
within and are supported by the steering knuckles. Open