[QUOTE=Coopdevil;8893710]
Well the first stage is to assemble the diff and screw the cover down with three self-tappers. And there's only two of the required size included in the kit. Not impressed. Am I right in thinking that I will have to provide that missing third screw or risk crud getting into the diff casing?
You probably should put something in there. If you can't find a similar self tapping screw, an M3 machine screw will work just as well.
MA12 just does not fit into the gears. At all. Is the instructions implying that it needs to be rammed in with sheer brute force? I just cannot see how the bearing will go in there without breaking the gear.
I've never heard of anyone having trouble with that bearing. They usually fall right into the gear. It should drop into the outer edge of the gear and then get recessed into it about 4mm. Maybe some careful examination for casting flash or an edge that's our of whack might be an idea.
Keep us updated and we'll try to set you right.