I just put the regular B&M in mine,because it is the type F fluid. At the cost of it I hope it is a better fluid. B&M will tell you unless you are running one of the new metric transmission don't run theirs or anyone else's synthetic fluid.

ATI has just come out with a synthetic fluid that you can use in the older transmissions.(ATI also said not to run synthetic before they come up with their own brand)

All of the above was told to me by techs at ATI(whose trans&converter I run)& B&M.