A well built 4R70W can support upwards for 800HP @ Block. A local guy here builds them and guarantee's them to 600HP/650TQ. I know that Baumann Engineering makes them and swaps them into their Cobra drag cars.... they make pass after pass w/o failure, and more consistent.
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// 1998 GT-Steeda Conversion \\ -- Sold
// Now own 2001 F-150 SuperCrew 5.4L \\
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