[MrForbes]

I don't know, I didn't read the directions, or look at the drawings for that gearbox. If the bearings are falling out, and the flange is on the outside, my guess is that it should go on the inside. I just wanted to suggest something for you to investigate. I know that often students assemble parts without really understanding how the design works..when it falls apart, then they get to figure out what's wrong, and sometimes they grow to understand the design through this process. It's called experience, and I like it. Almost everything I know about machines, I learned by breaking them.