Drive train Slack

[99_F250_SD]

I have a late 99 f-250 superduty long wheel base with the 7.3 and zf6, there is alot of slack in the drive train and i dont know what to do because it is really bugging me with all the slack

[75F350]

Tighten it up. Something has to be wrong. Any drivetrain component should be tight and free of any slop.
Have you, or can you determine where the slop is? Bad u-joints, worn driveshaft components, or even a pinion nut that has come loose will result in this slop.
Perhaps something in the differential is where this problem is.
ANything is possible, but you will have to identify where the problem is.

[99_F250_SD]

well i posted this because i know it is a common problem with the superdutys and i was wanting to see if anyone else had a suggestion to what they did to fix the issue