Hi i'm new to your forum I have an 04 wrangler 4.0 had front end noise, took it to the dealer was told right front wheel bearing was bad and of course not covered under warranty and was also told both side axle u  joints were bad those were covered by warranty told dealer to replace u joints brought it home changed wheel bearing myself dealer wanted $350.00. I still have growling noise in front end constant on highway when I hit bump gets louder as body lifts and when it comes down gets quieter does not go away. Also at low speed makes noise around 35 mph and when I come to a stop any ideas?  

BEARING NOISE
The axle shaft, differential and pinion bearings can
all produce noise when worn or damaged. Bearing
noise can be either a whining, or a growling sound.
Pinion bearings have a constant-pitch noise. This
noise changes only with vehicle speed. Pinion bearing
noise will be higher pitched because it rotates at a
faster rate. Drive the vehicle and load the differential.
If bearing noise occurs, the rear pinion bearing
is the source of the noise. If the bearing noise is
heard during a coast, the front pinion bearing is the
source.
Worn or damaged differential bearings usually produce
a low pitch noise. Differential bearing noise is
similar to pinion bearing noise. The pitch of differential
bearing noise is also constant and varies only
with vehicle speed.
Axle shaft bearings produce noise and vibration
when worn or damaged. The noise generally changes
when the bearings are loaded. Road test the vehicle.
Turn the vehicle sharply to the left and to the right.
This will load the bearings and change the noise
level. Where axle bearing damage is slight, the noise
is usually not noticeable at speeds above 30 mph.

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:
² Check for insufficient lubricant.
² Incorrect ring gear backlash.
² Gear damage.
Differential side gears and pinions can be checked
by turning the vehicle. They usually do not cause
noise during straight-ahead driving when the gears
are unloaded. The side gears are loaded during vehicle
turns. A worn pinion mate shaft can also cause a
snapping or a knocking noise.  

Thanks I will try it and let you know. Thanks Shawn