well quick and cheap things 1st. check your tranny fluid level. remove the dust shield from the tranny and make sure your converter has all its bolts in place, aswell as the rear end. this may be causing the vibration you mentioned. as for the noise, its one of those things someone would have to ride along with you to help diagnose. but do the fluid 1st, then check back in with us and let us know if anything has changed.