Hey guys. I got my Jeep (97 TJ 4.0 3-Spd.) back from the shop and since then, its been vibrating (on the interior) and idles loudly when it's just sitting in drive or reverse. When I'm driving, it's okay and when I put it in park, it goes back to normal. I was told nothing is wrong but something must've happened for it to be idling differently. Anyone know a cause and fix for this? Thanks!