The other day I started up the jeep and I heard and could feel something rattling while sitting in the cab. It's coming from below the middle to the passenger side of the cab possibly right behind the front seats. I thought it was my muffler so I tried listening to it from out side the cab but couldn't hear it or find anything rattling against the floor boards. My first thought was the transmission or transfer case but it rattles in all gears including park, reverse, and neutral. Non the less, I had to drive it across town back home and the transmission didn't skip a beat. Has anyone had this problem and if so what was the cause? Any help would be great!

 

No one has a clue? A buddy told me it could be a mount, either a transmission mount or exhaust mount. I have yet to check it out due to lack of time and bad weather and no garage