[suicideneil]

Sounds like a familiar issue- the bearing hole in the half-case isnt deep enough for the input shaft, so the bearing crushes against the gear when its all screwed together.

Fixable if you have a vertical mill and endmill bit, otherwise it needs specialist attention or returning to FLM for rectifying.

Rather annoying really as my stock plastic halfcase is rather ropey, but I wont replace it with an FLM item if its going to give me headaches, and I aint spending $100 on a full metal tranny from somewhere else just to get the half that I want.