I went to get a alignment the other day and they said my rear end was 3° off hangers and leaf springs all look good if you look at it you can definitely tell it's off center any ideas what to look for or what could be the problem

sounds like you got a handle on what it might be. obviously something to do with the rear suspension. might take quite a bit of time measuring this & that to find out exactly where its at...

fwiw, most of us aren't running with a thrust angle perfectly in line with our trucks, and that's from the factory! but I doubt 3 whole degrees off is factory. i had a fender bender long time ago where one of my hangers was bent. it pushed the thrust angle a couple degrees to the right of dead center. i've been driving it like that at least 50,000 miles lol

here's something that might help. drive it as straight as you can on some soil that you can see the tire tracks easily, then see how bad the dog track is. take a pic and post it up!
edit: the bonus for this is that you can do a little bit of trig and verify yourself about how many degrees off it is, and then compare that with the shop. not saying they are wrong, just sayin

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1999 xlt 2.5l 5-speed Supercab 159k
83 diesel 2.2l na
06 F250 6.0l psd
{click for lol}

The only thing I can seem to find is me leaf on the driver's side is off a little would that caus the whole axle to shift

Could possibly be a bent frame if nothing is damaged on the rear Suspension. Has your Truck ever been in a wreck?

Check shock mounts, leaf spring hangers, basically all the things that the axle connect to. If you don't see any cracks or bends, then I'm 99% sure youre fine. Mine is the same way if that helps. Pics would clarify a lot though.

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2008 XL 2.3l 5speed 2inch rear drop shackles. 15x8 rims on 235/75r15

I'm not to sure on how to post pictures and truck was in no wrecks I did have a back tire fall off while driving and that's the side the leaf is a lil bent but on the other side if you look at the wheel it's more noticeable