My 2000 Merc Sable/Taurus has the AX4N, and I had to replace the front seal which damaged the snout of my torque converter by making a tiny little grove in it's snout resulting in a leak. Otherwise the transmission worked perfectly. $12 for a seal and $100 for torque converter, plus a whole bunch $'s for other parts like hoses and vacuum lines you'll replace just because it's really difficult to get later on.
As mentioned it's a nightmare for normal people that don't have professional equipment like a car lift and a 1st class transmission lift.
Ford designed the entire engine/transaxle to be supported and installed in the factory as a single assembly with a single carrier. When you drop the carrier everything wants to come out, but that is a huge pain to disconnect the entire engine from the "car".
So what they do is unbolt the transaxle from the engine and drop the transaxle from below with the carrier while still supporting the engine with some jury-rigged chains and braces. If your a Ford mech and have the right stuff it's better, but still a jury-rigged IMHO.
It can be done if you got the tools and some fairly large brass ones but it's not for the faint of heart.
Last edited by teagueAMX; 07-21-2012 at 05:13 PM.