Swapping out a Dana 35 for Dana 44

[RHanna]

Don't mean to sound stupid but what's an sye this is the first time owning a Wrangler my rear end locked up so I'm replacing it and I got a 44 cause that's what the metal tag said it was (someone switched tag it was originally a 35) I have it in but one side has no clearance it's rubbing on the spring and one side has clearance so I'm trying to figure out how to fix the issue

It isn't a stupid question.
SYE, slip yoke eliminator.

https://wranglertjforum.com/threads/the-official-sye-slip-yoke-eliminator-thread.100/
I'm not sure what you mean by someone switched tag originally a 35.