The bearing you posted the pic of is the needle bearings for supporting the front axle shaft in the front hub. It's there for when your front axle is spinning. If you are in 2WD then it is not in use. It should have a good amount of lube in it because it will dry up over time because you don't use 4WD all that often.

Inside the hub there should be a fare amount of grease around the inner and outer wheel bearings. When I did mine I packed the wheel bearings well, but then put in extra grease after to make sure they stayed packed. In between the bearings you'll want to pack in extra grease because this is a grease reservoir to keep the bearings packed all the time.

The tension on the wheel bearings is measured with a pull gage. If I remember right it should be measured by connecting the pull gage to one of the wheel studs and as you pull on the gage in the direction of rotation it should be less than 3 û 5 lbs. If you donÆt have a pull gage, then as stated the wheel should rotate freely when spun, but also not have any lateral movement when you pull/push the top/bottom or on the right/left sides of the wheel. If you have any play, youÆll want to tighten them up. Make sure you seat the bearings before running the pull test. To seat the bearings you snug them down, spin the hub back and forth a couple of times, back it off, and then set the correct pressure.

Logansportage <img src="/forums/images/graemlins/patriot.gif" alt="" />