When I had a new transmission in my car the guy who did it was a specialist and he told me there were different versions of the ATX and they were not interchangeable.
I may have an auto box soon if the 2001 car gets broken...it won't be for a few weeks though
Also, the vss controlls the gear shift, speedo, cruise control, radio volume sense to name a few.
You can buy my car with an uprated ATX with a kevlar torque converter, it cost me £1600but is drive like no other auto cougar I have driven