I just replaced the center support bearing it was a pretty easy job. The bolts holding the two parts together were kinda stiff and I had to drop my exhaust(that was hard because the morons who put it on used sh*tty bolts and they were very hard to remove). Anyway after I replaced it the clunking driveshaft noise is gone, thank god, but there is a vibration that seems to come at a 3000 RPM in the 1st, 2nd and 3rd and then go away at higher RPM. Is this caused by a out of balance driveshaft or something else? I think the car has a lot of miles on the woreout bearing, could this have caused it? Thanks for any help.