My BOM# on my rear axle is 605247. Going by the listing on every website it is a D70U. So 4 months ago when I knew I was getting the axle I bought a D70U rebuild kit from JBG. I knew I needed it and I had the money at the time for it. So 4 mo go by and I finally get started on my rebuild. Started looking and the pinon bearing is about 2 sizes bigger then the one out of my D70. Call JBG and say the bearing is wrong, gave them the bearing number wrong and right and the BOM#. They call me back and say they talked to their bearing guy and he says I have a D71 and it will be an additional $35 for the bearing, race and shim kit that I need. :banghead Did they even make a D71 or is he saying a D70-1? I thought the only difference were between all makes of the D70's was the D70HD. What should I do. It has been 4 months since I bought the kit. So I think returning it is out of the question. Should I try to return it? I now have all the Timken bearing numbers and can purchase them seperatly? Any info on a D71 if it really is one. Seems like a bunch of BS to me.