OK so I was wondering if it is possible to swap a g37x rear diff to replace my 05x rear differential? I want to do this for the 3.7 gearing in it instead of my stock 3.3 gearing. If anyone has info it would be great. Yes I am new and I did search first and only found threads of switching to a coupes rear diff. But none focused on the x model either that I noticed. Thanks for the help in advance

 

Not sure if the G37x fits, but you would have to do the front one too. Or you would probably experience some major destruction when the AWD engaged.