yes- I had a car that I cracked the stock u-joints a few times.

A big block in a car that had a 6cyl tends to do that, lol.



under load the vibration was terrible, if it wasnt under

load it wasnt that bad.



you have to visualize a cracked u-joint, when there is more load

put on it it will get worse, when there is no load it wont be as bad

Yeah if it was cracked, that's another story from just having wear slop in the joints. Power application would flex the cracked joint and make it vibrate like hell! LOL. I don't think Shane is making enough power to crack his u-joints though.

slop in the joints would still cause more problems when under load

You can take your existing shaft to a drive train shop and they will put new greaseable, replaceable u joints on your shaft.

Had mine done last week for $116