front shaft

ok, my front drive shaft was clicking the other week so i removed it changed the 2u-joints at the cardon end. not it vibrates like crazy. any clue what happened? should i just get one from the junk yard and use it and keep my new u-joints out of my old one?

you put the center section of the cardon in rotated 180* of how it used to be. the entire driveshaft is balanced as one piece, so by putting it in the other way, its now not balanced. most people usally draw a line with a marker or sratch a line with a screwdriver to make sure everything is re-aligned correctly when the new u-joints are put in

makes sence. i wasnt using my head right. i'll give that a try.