alright we solved the problem. my front cab mounts were broken and sunken in too much. i was looking at it in the garage in anger and looked closely and saw the cab was tilted forward. my fenders were coming up over the cab body. figured it was because they were both replacent fenders from being punched in a few times but it was the mounts. lifted it up and had to do a whole lot of welding. lots of rebuilding but it sits straight now, and the noise is gone. it was sitting on the engine/tranny. so glad its fixed now. now im putting on some stacks today/tomorrow