Back up for you on this one. I am having the same problem as well. I am taking it over to my friends shop to inspect. I get horrible vibration when stoping. The shifter also moves. I know i have a front stuck caliper but that is not it. Deff coming from the rear. I am going to balance all my tires and inspect anything that can flex. Ball joints too. I will let youknow what i find out tomorrow. I just purchased this car as well very clean 93 LS400