Driveline Vibrations....again.

Ok, so I am hoping someone on here has been through the same and can give me some advice.

Truck: 2006 double cab, lifted with DAKARs in the rear, and toytec/eibach front lift. Recently went from completely wore out Cooper STT's (265/70R16) to Duratrac's (265/75R16).

I had slight vibrations with the STT's but attributed it to the bad tires. After the new tires I noticed I had vibrations only when I was accelerating. (When coasting it was perfectly smooth)

Ok swapped out all the rear u-joints and went ahead and replaced the Carrier Bearing while I had the driveshaft out. Now I have vibrations all the time (accelerating, coasting, decelerating). Any ideas what could be causing the problem?

 

Is the vibration only when you take off? In the first few miles per hour?

 

No, it is throughout the speed range but actually may be less significant at lower speeds, making me think that something is out of balance. My first thought was tires out of balance, but before the u-joints and carrier bearing, if I coasted that vibration was not there so I don't think that the tires are the problem.

 

did you mark your drive shaft when you took it apart. The 2 piece unit is balanced as a whole, so if you spun any of them it would be out of balance.

 

I have 265/75/16 with no lift at the moment and i have vibrations sometimes at the 60-75mph range. Not sure what its attributed to. Vibrates enough to vibrate the seats...

 

This could be the culprit. I made sure to line up all the driveshaft yokes but maybe i have one flipped 180. Think that could cause enough vibration? Any chance that you would have a picture of your driveshaft so that I could compare with mine? (if you have a stock shaft)

 

comparing it to another wont matter as they are all balanced different.