I had a bad wobble at the same speed, and went away after 100-110, only on mud tires, on road tires I had no vibes, I had lots of suggestions of stuff that was wrong, the tires were in rough shape, got new ones, balanced, it was good to go,
Also took the jeep to Vancouver, 3 guys and every extra square cm was packed with stuff, it wasnt to bad... Corners through bc had to slow right down, and my friend almost tipped it thinking he was still in his mustang on a couple corners, hard on gas, and slow, but I would do it again,
I have to drive it out to Sudbury in another month or two, I did that drive in a mustang in April in 28 hours of driving, not looking forward to doing it in the jeep, again slow and hard on gas, but you will get there