I am rebuilding my 35C rear axle with a 3.07 ring and pinion. Don't have any issues with the rebuild except that it appears there may have been axle seals in the diff. housing. Just outbound of the carrier bearings the housing is machined out and there was traces of red (adhesive) there. I don't see them in parts breakdown yet O'reilys has ordered them for me. I know there are seals outbound with the bearings, but don't want to not put inner ones in if they are suppose to be there. Also what is the difference between a 35 and 35C axle?