2004 - 2007 non e-locker would be best. You need to be careful because complete rear axles have been replaced in some Titans under warranty, so they may not have the OEM rear axle. The 2004-2007 use 32 spline axle shafts. 2008+ use larger diameter 35 spline axles. The e-locker has different length shafts which requires shimming of the axle bearing on one side or (better) replacement of one shaft for TrueTrac install.I'm going to see if I can find rear end out if a folder model is it the 2004? Did any titans come with it stock if so how do I identity it? I gotta see if that is cheaper than buying a dana 60.