So are the "old" t5's (borg warner) any different than the tremec t5's? Different bearings? Gear material? Etc...
I would assume they might make little changes as the years go on. I can't imagine the 1987 tranny (new) woudl be as good as one made today. Besides the tranny year differences.
I'm sure the "tremecs" are slightly revised. Just because the market tends to better itself often.