Bruce, that would not lubricate the splines where the tranny output shaft make contact with the splines of the diff input. Bob Helt In a message dated 7/23/2015 6:11:59 P.M. US Mountain Standard Time, virtualvairs at corvair.org writes: Why not put a solid (no hole) gasket between them and put Redline in the trans, Amsoil in the diff? Bruce Weeks