I was just going what oem parts finder was calling it. They must of switch names on it, i remember seeing output shaft before  or in my manual  one of the 2 places. I was think about  trying to drill in the middle of it, already has the hole started, Worth a try none the less. Im ordering a new one in the morning.  so real isnt going to hurt anything to try. I checked my 87 bottom end, it isnt as bad but it still wobbles. But it has ate my case up pretty good. If i dont stop the problem, right side of my case is going to be shot. Other then that everything has went well with rebuild, except the phillips  screws that hold shifting drum  plates and the phillips  screw that hold the bearings. I got one out with out striping the threads had to easy out the rest.