I had a friend who was cleaning out a garage full of Ford parts. In a box is a used trans from a newer Ford. I don't know anything about it except it will not mate up to a 302/5l motor. The tag reads XR3R-7003-AA. Any help would be celebrated on my part with a swig of beer in honor of the person providing said info.
your answer here:
http://www.mustangforums.com/forum/4-6-modular-mustang/377691-which-transmission-do-i-have.html
for a modular 4.6
Thank you, I found the part number at Tremec, it is a T-45. I will now drink a beer in your honor!
Ooooh! I'll give you $10 for it! 
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