This is something that has been bothering me for a while. As soon as I hit 90mph my car starts vibrating and shaking like crazy. I always feel like it is gona fall apart. Any suggestions on how I can get rid of this? thanks
if you've taken the driveshaft off recently and didn't use new lock washers, check those nuts and bolts, and get new lock washers. i didnt and a few of the nuts vibrated loose and it was awful at anything over 30mph
oh yeah, also, if you've removed the driveshaft recently, maybe you didn't bolt it back together the same way you undid it. i hear it's only in balance in one of the possible configurations when bolting the two pieces together.
I recently had this problem for a little while. As soon as I hit around 75 the car made an ugly sound and rattle. I thought for while and then remembered when I replaced my transmission I had only put one bolt in to hold the driveshaft bearing support. I had the bearing bracket upside down. I spun it 180 degrees and both bolts went in and made sure it was perpendicular to the shaft and the noise and vibration is gone. It could be your drive shaft bearing or the shaft itself is warped.