Is this to much slop in my rear end?

weekendwarriorfsw32 · Sep 12, 2013

Lately I have been having a virbration under load towing and some noises that sounds like something is loose in the rear end. Drive shaft is brand new and balanced. Took a video of the left to right motion I can get out of it when I have the truck in natural and turn it.
http://youtu.be/dIYOPx7l-yw

Let me know what you guys think, this is on my F-450 with 170,000 miles on it but this rear end has about 70,000 on it.

weekendwarriorfsw32 · Sep 13, 2013

GCncsuHD · Sep 13, 2013

My 2000 7.3 with the ZF6 and 3.73 open rear has about the same amount of play, the backlash seems excessive, but I have opened it up and measured. 195k on it.

weekendwarriorfsw32 · Sep 15, 2013

Bump any one?

duddy · Sep 15, 2013

Seems about the same as my truck right, but I did just blow the drive shafts out of mine. I did measure mine, and it was on the high side at .0010" backlash but that is still a good set. You may have it a little worse than mine though.

What speed is the vibration at? I am getting one at 40 to 75. May be the problem.

GCncsuHD · Sep 16, 2013

duddy said:
What speed is the vibration at? I am getting one at 40 to 75. May be the problem.

Should have mentioned with mine, I also get a vibration, but only from 75-80, and with no load. I can smoothly accelerate from 70 to 80, but if I let off and coast it will vibrate until it is below 75 again.