Hy Iron Clad, if you change from a corporation diff. to an Eaton, the driveshaft might have to be lengthened or shortened, and the "U" joint may be heavier than the one your driveshaft currently, so a different end yoke would have to be installed on the driveshaft to match the new diff., all minor stuff actually. Are you talking about changing the entire rear axle or just the differential? What ratio(s) is the new diff/axle going to have?

Last edited by 3B; 10/14/2011 3:45 AM.