oh that's interesting, so both ujoint should aligned. That might be what happened, because half of the driveshaft fell down when moving it and then I just inserted one inside the other and that might have cause the problem, that they are unaligned. Tomorrow I'm gonna check that up, thanks!When you connect the 2 halves of the PTO shaft are the U-joints on both ends in phase. That is when one X is horizontal the other must match it. If not, they will be out of phase and traveling at slightly different rotation speeds.