So, the Ford BF comes with a ZF 6 speed and makes up to 405 HP/398 lb ft. Probably a 6hp26 behind that. HP tuners does have support for that model, and in addition I can confirm they have support for the ZF TCM in that model. I need to update my software, but I can take a look at those tunes and see what they have done. For V8s that started at 398 lb ft and have been modified we can probably learn a bit about the limits for the trans in terms of shift pressures, shift times, etc. Looks like there is a good bit of info on this thread (you may have to sign in)
http://www.hptuners.com/forum/showth...-in-2-25-Beta/