Ok, my entire car shakes now these days at speeds above 90. I do have 4.10 gears and i don't have an aluminum driveshaft(although technically it shouldnt make a difference). Last time i took the tranny pan off, i had blown the filter completely off and ive been blowing fluid out the dipstick tube at high speeds. Also, ive been told that my overdrive rotor might be warped...time for a new tranny...im not gonna rebuild it...screw that...ill just get a manual if i need a new one.