I know this may seem weird, but the stories of people building the diff round the wrong way, how exactly is that done, you follow the manual, how hard can it be? + they're handed and can go in only one way. I dont see the problem
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Just waiting for my ceramic balls. If I still have problems, I'll never know. Here's how i've previously set up the tranny: I've had slipper set for slipping for couple of feet hard on standing start, had diff set for no slippage, the old allen key in outdrives and turn gear by hand trick. Hows that?