Do you think you should've gone with the steel shaft?
My center bearing is pretty much dead so I need a new driveshaft too but I can't decide whether to go with the steel or aluminum one.
How bad is the noise/vibration/rumble above 70mph? Does it get worse?
I take my cars to the track and my Supra will reach speeds of 140mph or higher and I really don't want the whole car to shake because of the driveshaft.
Failure of the part at those speeds would be detrimental too.