Hi. Have been looking at rockauto and autozone for a differential gasket for the 99 dodge ram 2500 p/u with a dana/spicer 70 rear axle and 10.50 ring gear. The inspection plate has 10 bolt holes. My question is: rockauto lists differential gaskets for the dana 70 axle and the dana 70U axle. Too confusing. I have no idea which to purchase for this vehicle. Any help appreciated!