So I've have come to a dead end with this and need help. I have a 98 jeep zj with a 4.0. Been running great but recently has started to get a bad vibration. When I crawled under to take a look the whole motor trans and transfer case exhaust everything is shaking. First thing I checked was all my mounts. They are all good. The vibration is the worst right when I start it up in park and also when starting to take off from a stop light? Was told it was a misfire or that it is runing lean ? But Idk this seems a bit extreme for just a simple mis fire or running lean
Anyone have similar problem or any advice ?

 

Take it to a shop and save yourself a lot of headaches.