Vibration in the rear end

[Joshua13]

My wheels are balanced.
I've checked DS u joints.
When I lifted the rear end off the ground, the LHS wheel seems to be catching on something. It goes slow for part of the rotation and then faster.
What is my next step? Inside the wheel or diff?
What am I looking for?

 

[Joshua13]

Video of tires:
https://imgur.com/a/Ktw5c0W

 

[RCP Phx]

That's how a diff works and you've got a fluid leak!

 

[Tim_MN]

The tires were balanced on a Hunter Road Force Balance machine that will detect out of round tires and/or rims ? My local independent tire shop works on tires for everything from commercial lawn mowers to 18 Wheelers and front end loaders. My XJ and CJ-7 tires are always perfectly balanced.

Often retail tire stores are helpless and clueless with anything that isn't 100% stock.


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[Joshua13]

That's how a diff works and you've got a fluid leak!

What do you mean that's how a diff works? I don't think there should be a point in the rotation where it gets stuck.
I know that it's an open diff and only wheel spins, but the other wheel seems to catch on something rather then just rotate freely. ...

 

[Tim_MN]

If one tire turns, the diff is OK. If both tires turn sometimes, the diff is OK. If there are no big chunks of metal missing from the ring and pinon or the spider gears, the diff is OK. If there are no metal sparkles in the drained gear oil, the diff is OK.

 

[SlowXj]

If the wheel looks to be "catching" and there's a fluid leak, I would look at that wheel bearing... ppl often overlook a leak thinking it's just a seal problem

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