New here, I recently bought a 2007 H3 with 27,000 miles on it. When driving between 45-65 mph the H3 has a shake/vibration feeling. It's more like a front to back shake feeling more than an actual vibration. Do you think this is a tire balance issue or analignment issue? Anyone have this problem before?

 

Sounds like a tire issue to me. I don't have any shake in mine.

 

tires or alignment probably

 

Mine has the same issue, but it feels like it happens after the automatic transmission "locks" into overdrive. Did you ever get the issue resolved?

 

can be the propeller shaft or coupling faulty.
Hope this help