Bad Vibration

[1badk5blaz]

Ok Lets see if anyone can help me. I had a little vibration from the driveshaft. I knew it was the u joints. I replaced the u joints and now the vibration is worse then before. Does anyone know what this can be?

76 Blazer 350/350/203, 44 4.56frt and 12bolt 4.56 rear, 4inch lift with 35s

 

[BL1TZKRIEG]

did it start vibrating after the lift was installed?
if so check the driveline angles

 

[1badk5blaz]

The lift has been on the truck for a few years now. Im just confused about it

 

[Yobtaf]

Changed u joints years ago on a fiat and had the same problem. turns out the drive shaft wasnt put back the same way and was out of balance. old timer had me put some worm clamps on and moved them as weights and all was ok

 

[Leper]

If is a two piece shaft, and the ends came apart, you may have put it together out of phase. Did you get all of the clips in? Are they still in? And, like stated above, you could have lost a balancing weight. Check for a real clean spot along the tube.**no sig lines please**

 

[1badk5blaz]

All I did was the u joints. I didnt take the shaft apart. I flipped the driveshaft today and ill see what happens. That is not a sig line, I put that there so people knew what I had since someone would have asked what I was running.