for a few months now, my car shakes like a motherfucker if i get it up above 75-80 mph. Went to get alignment done, and the shop said no alignment was needed, but there was definetly something in my driveline causing vibration. Any ideas what is cuasing my shitty ride? I have 2 theories...1. sometimes i do high rpm 1-2 shifts and make my tires chirp second, or 2. that i use my handbrake to slide around corners occasionally. i hate not being able to go 80 without being scared my car is going to fall into pieces. }( any help would be greatly appreciated.

Eric

Rotate and balance your tires.

^^yes that and possibly your tires have uneven wear also. Rotating and Balancing them will help this somewhat.
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Chris
96 ESI 5 spd
Milwaukee, WI

thanks...ill try that now

using the ebrake to slide around corners will put flat spots on your tires and cause the car to vibrate really bad. the only fix for it is to replace your tires. It wont do it too bad as long as your not sliding around a long distance and saying your not stopping the rear wheels on the same spot multiple times.

get some new wheels, ur ride will be smooth as anything

yeah i just rotated my tires, back ones are bald in a few spots, so i guess that is the culprit...good thing im getting rid of these ugly 14s soon and getting some gsx wheels/tires