my primary tranny gear (the one that attaches to the front sprocket) moved off of the shaft a lil bit making it really hard to turn. I replaced that part and everything spins freely until I get the allen bolts tight, then I cant turn it at all. the other gears look good. does this mean I have an issue with the other gears. am I tighten it too tight? im reusing the gasket, is that the problem. I just don't get it.