will a automatic transmission out of a 1992 lincoln town car fit in a 1985 ford mustang?

The Lincoln AOD tailshaft is longer than a Mustang AOD tailshaft.

The Lincoln's transmission will be an AOD-E. It will require a connection to a compatible ECU to function correctly. The 1985 Mustang does not have a compatible ECU. If the Mustang has the 4bbl 302 then you're out of luck. If it has EFI then there may be something you get to make the transmission work. I would just get a junkyard AOD and rebuild it.

I have an '06 auto mustang GT V8. I don't know how to drive stick very well, so went with an auto for convenience (and because I would be driving the car every day). I'd like a manual just for the fun of it, but don't really mind either way. the car is the funnest thing ever. in terms of how fast the car accelerates in comparison to a manual, its not a big difference (tenths of a second). if it really matters to you, a custom ECU tune can make an automatic car shift faster. its a matter of what you want to deal with if the car is going to be your everyday car or just a weekend toy. if you feel like having to pay enough attention to shift a manual every day, do it. but there's really not a point to one unless you really enjoy driving stick, which a lot of people do. auto GT mustangs (the V8 ones) are harder to find than stick ones, and base V6 stick shift mustangs are harder to find than auto ones. cars similar to a mustang (but different in price) include the nissan 370/350Z, the mazda rx-8, the chevy camaro, the dodge challenger, and the dodge charger. all of those are generally more expensive than a mustang, some by a lot, some by a little.

Ford in their infinite wisdom made 4 bolts match and 2 not match the engine pattern so no you cannot use a 4.6L trans behind a 5.0L engine

Yes it should work both were AODs and both used the HO motors. Ford did not switch to the modular (4.6) motor till 96.

Mike is right.

i highly doubt it would work out for you