Re the pinion seal socket, Ron B said on a previous pinion seal thread, "I use a punch all the time to undo them ,mainly because i am going to replace the nut , but what you can do is check out a place that sells used tools,such as pawn broker. Buy a 1/2" or 3/4" drive 36-38 mm socket and use a disc grinder to shape the four tangs .Dress it up with a file and you have your tool."