How can you tell if your drive shaft is vibrating? I tore my boot on my front drive shaft so I switched to a Coast 1310 but something doesn't feel right or I am just paranoid! Would you feel it in the steering wheel or would the T case level be shaking? None of which is happening but just do not want to find out the hard way.

 

You will know when your DS is vibrating. You will definitely feel it.

 

Pull the driveshaft and go for a drive. If the vibes go away, you just narrowed it down.

If that was the problem, re-install the shaft and start messing with your control arms.