[Excaliber]

Cashburn I would really would like to research just what kind of unit the BMW is. If it's not really open, what does that mean I wonder.

There are all kinds of different style posi units, some just "help" get both wheels traction. Then there are "locker" units, when pressed into service they WILL make both wheels turn, but you don't always want that 100% lockup thing on a road course. The ultimate would be a "spool", both wheels ALL the time, even in corners or while parking, very radical (typical drag race application).

Do the BMW units employ some kind of "clutch" mechanism for a "soft lock"? If so, maybe Dennis broke his!