us in SM have all kinds of problems breaking diffs, with failures including bearings, ring gear bolts backing out (the most common), cooked fluid, and broken teeth on the ring/pinion gear.

we have not been able to track down a cause for our failures, and it seems to be completely random which ones fail, but i haven't really heard much about ITA miata diff's giving it up. do you guys break too and we just don't hear about it, or are you not having any problems?

if you're not having any problems i'm curious as to what you're doing differently than us. we use the mazdacomp unit in the factory casing with no modification, new bearings, new axle seals, and plenty of loctite in the ring gear bolt holes.