What would the cost diff be between the 4l80 and the AODE (? don't speak Ford).
My understanding is the Henry trans has a reputation that isn't the best, so would it take more to build to a similar level?
I would like to apologize to LJS30 for my part in taking your thread way beyond your original question. There is some good info flowing through here.
the cost in parts should be fairly close, but for what you get, ford is usually more. the 4l80 is stronger, but the 4r70 has a better gear ratio. both will need after market shifters and controllers. and of course, an adapter plate.
