First off, here's a pretty good rebuild guide for the AX4S:
I've had my car (01 SES Wagon, Vulcan with AX4S) for 5 years, and it currently has 250,000 miles on it. The engine and transmission are original, but the engine and transmission are original. No work has been done on the transmission beside regular maintenance, and it's starting to go.
I have a few questions regarding some of the symptoms I have.
The first sign of issues was sluggish and rough shifts. The most noticeable is 2-1, and sometimes 1-2. Then, it started shifting a too high speeds. When I take it out of the driveway, I accelerate very slowly, and I can get to 3.5k to 4k rpm
easily in first gear before it shifts.
The next issues were with shifts from drive to park. The shifts became extremely rough, and eventually they were able to cause the car to stall.
A local transmission shop said this was due to the torque converter not unlocking. I don't think this is true, because when I'm not moving in drive, and the engine is running, the torque converter must be unlocked.
When the car's in drive but not moving, the engine side of the torque converter is moving, but the transmission side isn't.
When a car is in park, the engine side of the torque converter is spinning, and the transmission side is.
This transition is causing issues for me. Is it best just to put in a new torque converter?
I also plan to rebuild the transmission. I've never done an automatic gearbox before, but I think I can do it with the guide posted above. I might also buy a service manual for it. Any suggestions?
Any suggestions for a complete rebuild kit?
The trick for me is going to be taking out the transmission. I plan on dropping it out the bottom. Are there any special tools needed? How high must I raise the car to get it out? Would it be feasible for me and two/three strong friends to get the thing out by hand? Is it just a better idea to just buy an engine hoist and pull the engine? How much work is pulling the engine on a Taurus? If I do pull the engine, what should I replace while I'm there?
Thanks in advance!