What's broke?

Dexron isn't 'made for' stick transmissions. The folks selling the New Process gearboxes in their cars (Mopar) say it is suitable for use in those gearboxes. No argument is being made that Dexron is The Best oil for the job, but it cannot be argued that it is NOT suitable for use.

Ha...well, of course it can, but it is neither a useful nor correct argument.