Identifying Auto transmission and leaks

[lyd]

Hello,

New owner of a 1971 Bronco and trying to get all the oil leaks out. The auto transmission should be a C4 and leaks from the selector shaft seals and the oil pan for sure. Oil pan is warped. Having a really tough time finding the right pan and gaskets. My pan does not have a notch and I cannot find such a pan or gasket:

https://drive.google.com/file/d/1bExk5cwnx7D4mD-Bcur3KR50UlnReQfM/view?usp=sharing
Thank you in advance,

 

[DirtDonk]

Wonder if that makes it an FMX, or perhaps it’s just a passenger car version of a C4.
Or maybe the occasionally mentioned C5? Or is that C3?
Shows you how much I know about automatics!

However, I saw a fantastic chart showing all the Ford transmission identifications based on the pan shape.
I can’t remember if it was here or somewhere else. But I’ll see if I can find it.

 

[Broncobowsher]

Wonder if that makes it an FMX, or perhaps it’s just a passenger car version of a C4.
Or maybe the occasionally mentioned C5? Or is that C3?
Shows you how much I know about automatics!

However, I saw a fantastic chart showing all the Ford transmission identifications based on the pan shape.
I can’t remember if it was here or somewhere else. But I’ll see if I can find it.

FMX is a cast iron case with integral bell. Ancestor to the AOD
C5 is the last breath update to the C4. Most parts interchange. But some versions had odd stuff like centrifugal lockup converters.
C3 is a tiny lightweight transmission for 4-cylinder engines like you would find in a Pinto. It later gained an overdrive (like the C6 got an overdrive and became the E4OD). Ford sold millions of these 4-speed lightweight overdrive transmissions. It was the 4-speed used in Rangers, BroncoII, and when beefed as much as possible was put behind the 4.0 V6 in the 1st gen Explorer. The transmission was the A4LD. That stands for Automatic, 4-speed, Light Duty. Has an integral bellhousing so it can't be bolted to any V8