Is truck a clean title? (ie not salvage?)
How are your door/fender/hood gaps?
Any evidence of an accident or it was jumped?
Something is not adding up here...
1 - Either it's not the stock axle and whoever put that one in there did not do a good job - if you can find the BOM we can narrow that down. Check this site
https://www.differentials.com/techni...dentification/
2 - The frame is bent somehow allowing the axle to shift over like that
3 - Its the right axle....and it left the factory like that????