drive line vibes

[big boy toy chevy]

I had u joints replaced on my truck.....I dont think the drive shaft was replaced the same way it came out because there is a vibration in the drive line starting at 50mph that wasnt there b4.......can this damage the trans or rear end.......what can I do to correct the vibe .....rear drive shaft has been balanced and its still vibrating..

 

[retorq]

If it was balanced then your vibration is more then likely somewhere else. They only go in two ways, try changing it and see if that helps.

 

[big boy toy chevy]

ok will do... any other possible area I can check .......

 

[SunlitComet]

grab the ends of your shaft and shake it looking for loose components and make sure the u-joints are installed properly.