vibration after 90mph

finally got my car tuned so im actually driving it a bit, but after doing a few pulls i quickly found a bad vibration (shakes the whole car) at about 90-95ish.

its not engine related, just speed.
i doubt its the driveshaft since that was balanced at a driveshaft shop before i put it on.
tire pressures are all ok.

what are my other usual suspects to check?

wheel bearings?

would like to try and narrow it down so i dont have to just throw parts at it until i find the problem.

any ideas are appreciated.

pinion angle?

loose lugnut? Can you tell where the vibrations coming from?

loose lugnut? Can you tell where the vibrations coming from?


not really........the whole car shakes, lol

ill check the lugs tomorrow, it has been sitting for a while so its possible.

Make sure the u-joint caps are properly seated, DS makes a hella of a mess if you throw it out of the saddles. Danny Mc

After you check everything else, I would say throw in the aluminum 1le driveshaft. I picked one up off of ebay from a junk yard for under $100.

Tire balance? Front end alignment?

I would check pinion angle and the motor mounts.