at least 80 mph
because Jeep Wranglers are easy to flip, especially turning at high speeds.
my jeep was doing this and they told me all this stuff that could be wrong with it and i got my tires rotated and it fixed the problem..
61 mph I've been over 100mph in mine. 4L Auto 1995
Probably bad u-joints in the front. Had the same.
exhaust your tyres need balanced any exhaust or tyre garage will sort it.
you may either need new tires or a front end alignment.
If you are in Full time it is recommended not to go over 25mph that is probly why it shakes put it in part time you can go up to 55 mph in part time
Probably some sort of balance issue. First suspect is tires, less common is drive shafts. HAVE IT CHECKED FOR A WORN OR LEAKING STEERING DAMPER
With less then 20,000 miles (engine not broken in) at 65 mph, flat ground towing a jeep wrangler it gets 7.4 mpg.
Have you checked your tires lately are they old, need rebalanced? It also might be the steering stabalizer, the bushing do wear out after a while.
Warped rotors