I have a 2011 Jeep Patriot 4 wheel drive something in my engine bay has been banging my frame for a long time I can feel it through the driver seat I take it into my mechanic that works on my car I told him my symptoms and he looked underneath and he said he doesn't think anything is wrong with the car everything under there was tight and not moving nothing was loose still when I go over the slightest crack in the road I feel a violent bang on my frame or subframe I can feel it and you can hear it it's not the motor mounts had them checked I'm positive as to what it is it's very annoying I don't even want to drive the car anymore