If it is my post below that you are refering to, I apologize for the error. I could not remember the name Ford gave to their power shift system. And I did look at the decals on the tractor yesterday, reminding myself that Ford's name for the power shift section is "Dual Power". As we have had more IH's with failed TAs, I could remember that term.
The great thing about the Ford design is that it will hold the tractor back on a downhill, unlike the early TAs from IH. Secondly, the DP is a completely self contained unit located in the bell housing attached to the front of the tranny. So it can be removed for servicing without disassembling the tranny, very much unlike the TA located at the bottom of the tranny in the IH 3688.
I had no intentions of suggesting that Ford used the IH TA. I have disassembled both, and they are vastly different, with most advantages (as I see it) going toward the Ford DP. Sorry I confused you.
Paul in MN