i`m about to order some 4.56 gears for my 04 heritage 4.6, right now it has 3L55 and im assuming that is limited slip?? and when i get new gears will the stock limited slip still work? and how do i find out my size like 8.8 or 9in rear end. and one last question what is a good brand to use?

 

Check this thread , I think post #3
https://www.f150online.com/forums/ot...ial-cover.html