If you want info on the newer trans go out and buy book on tpi and tbi engine swapping by Mike Knell.I bought one fromspeedway motors lincoln Ne and its worth every penny.From my first read fron it I understand the 4L80E was fron 3/4 and 1 tons.You can go to the 4L60E which is an update of the 700R4.The 4L80E is basically an electronically controled 400 with a overdrive gear added.
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