yep it was the botton, not shure how it fell out while all put together. I did put the 2 way bering in backwards, oops. The part that was not screwed on was the mechanism to shift into second gear, that set screw was missing . I could not turn the second speed gear while it was in the car andI believe the thing that two speed shifting mechanismbeing not screwed down was wedged keeping it in second. I stole the set screw from the front dogbone cup to use so it will be 2 wheel drive till i get another but at least the 2 speed seems to be fine and working now.Also the cluch has worked fine all the time i believe. Not shure what this spring and ball is. stopped raining finaly. I'll try it today and let you all know how it goes . Thanks