I had an annoying vibration only when going 45-50. I could feel it in my steering wheel and gas pedal. I just ignored it because I never really drove that speed often. I finally had to get all the u joints replaced and the dealer called me regarding a vibration. I said I never had one.( I lied because I thought maybe they screwed something up and were looking to fault me)haha. Anyway they took the driveshaft off and checked the balance of it. It came out ok per the shop they sent it to so they put everything back in and still vibrated. They decided to take it out again and put a new drive shaft in and the vibration went away. $900 later for the driveshaft but I am happy it is gone.