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Mercedes Tech, you should have the 4R75W. Its power limit lies somewhere between the 4R70W and the 4R100. Like I said, no tranny will be an easy swap. Ford's computers are ultimately based on the transmission it came equipped with, it is not something that can be compensated for via tuning. Thus, a computer swap is required as well. The mechanical troubles aside, you're asking for a lot of electronics hell waiting for you as well.
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