I thank all of you guys for your replies. Yeah, exhaust is gonna be the first thing I'm gonna look at when it gets a little warmer ouside. I'm having 2 small leaks from my exhaust in 2 different spots. There are just too many theories out there about this vibration issue, and I guess I'll have to isolate them one by one. There's also a small shock absorber underneath the engine area(there may be even 2 of them), did anyone try to replace it ?