Its not a wheel berring i done changed that

PROBLEM WITH BRAKE SHOES OR PADS.

make sure you dont a separated belt on one of your front tires

do you have locking hubs in the front end? if not it could be your trnsfercase accuater not ingageing all the way.

get all 4 wheels off the ground,start vehicle,put in drive,with a large bar stop each wheel,itcan tell you which wheel has the issue.I've replaced all 4 hub and bearings,11/2 trs later the rear went again.... buy the best possible..hope that helps !

There are a few things that could make this happen, it could be that you have a tire that is out of round, that the front end is out of alignment, that you have a bent wheel, or that you have a bad/weak strut/shock. When the tires were balanced the technician should have been able to see if the tire was out of round, or that the wheel was bent, but remember that SHOULD happens and he may not have known to look for those issues. I would recommend that you have the alignment checked out, it is free at most places, and they can give you a better more precise answer to your issue, seeing as they will be able to inspect all of the suspect parts.

OK, I'm going to guess you are talking about the ring and pinion gears.
You need to remove both front axle shafts and remove the carrier to get the ring gear out. To remove the pinion, hold the yoke with a large pipe wrench and use a long wrench (for leverage) and remove the center bolt.
If you intend to re-build the differential you should know in advance you need a good dial indicator, a press to install side bearings, shim packs or crush collars, a good rebuild manual for specifications and experience in "reading" gear contact patterns.
Parts are expensive and if not assembled precisely they will self destruct very quickly.
Best option is to find a used "end to end" unit in a scrapyard, with the identical gear ratio. Replacement is faster and far easier than rebuilding, and less likely to fail.

sounds like the drive shafts may not be right back properly or maybe a u joint not seated in straight
jack the truck up and spin whel by hand with 4 wheel locked and look for the binding noise

SOUNDS LIKE YOU HAVE BAD LF WHEEL BEARING..JACK UP FRONT OF VEHICLE..BLOCK REAR WHEELS..PUT TRANSFER CASE IN NEUTRAL,SPIN EACH FRONT WHEEL BY HAND WITH OTHER HAND ON COIL SPRING..YOU SHOULD FEEL ROUGHNESS IN SPRING ON SIDE THAT HAS BAD BEARING..IT IS A HUB/BEARING ASSEMBLY

You also could have received a bad axle. Sometimes the rebuilds don't hold good tolerance and can make the same noise you are trying to get rid of. Is it full-time 4wd? Maybe the driveshaft ujoint also.

The 99 Jeep Grand Cherokee was prone to bad diff bearings because they changed the plant where they were made. The new plant used inferior materials. The only way to fix it is to replace and set the diff clearences.