Thoughts on vibration

Two thoughts here
Don't take offence, just spit balling
did a u-joint cap fall off during the gear replace and lost a needle or got a piece of trash in the cap?
or, did the slip yok, get remove and put back together out of faze. When you put the yok straight down, is the pinion yok straight down......or off a spline or two.......

No Offense i've done that a few times trying to get the shaft in and lined up with the u bolts but it went really nice this time.THis shaft has been used the week before with no issues so not thinking any yoke phasing on the shaft issues.What I've been reading is that tire balance seems to be a vibration that comes in and out at a certain speed as opposed to something else this does not get worse the faster you go.Thanks and keep them coming,just trying to figure out what type of vibration or harmonic comes in then goes away as you go faster,then reppears on decel back through that speed point





No Offense i've done that a few times trying to get the shaft in and lined up with the u bolts but it went really nice this time.THis shaft has been used the week before with no issues so not thinking any yoke phasing on the shaft issues.What I've been reading is that tire balance seems to be a vibration that comes in and out at a certain speed as opposed to something else this does not get worse the faster you go.Thanks and keep them coming,just trying to figure out what type of vibration or harmonic comes in then goes away as you go faster,then reppears on decel back through that speed point