I have a 2013 2.0 base and my diff is a 3.7. I snapped the left side axle at the drag strip the other night. Since I have to replace the axle I'm wanting to go ahead and put a 3.91 or 4.18 rear end in it. From my understanding all the differential carriers are interchangeable. Can anyone confirm this? Also the new 2013 axle will cost me almost $600, or I can get a set of new 2012 axles for about 300. Will the old axles work with the 2013? My plan is to buy a used complete diff carrier and throw in New axles but I want to confirm that all the older stuff will work before I start placing orders. Thanks ahead for all help.