Pretty simple, well not really but the tail housing of the 727 actually the two cases look identical forward of the tailhousing which i realize is where the OD unit is. so would it be possible to get a A518 or A618 and unbolt the tail housing and bolt it onto a AMC pattern 727. Now i imagine some machine work would be involved and i realize its not presto bolt it on and go now you have an Overdrive. i found a bunch of articles talking about dodge 727's being upgraded ... replaced with/ to the A518 or interchanging some parts and because it in its early years was fully hydraulic so it seems like a option??? so it seems the mechanics of operation might be there but whats it going to take machine work wise?

i imagine you get the gist, i have a 727 in front of a healthy built 401 in a tow rig, and im starting to think seriously about a 700R4 conversion on the next rebuilt for the tranny as she has 140k miles on her and the other day i saw a A618 on a shop floor next to a 727 and with a tape measure all exterior dimensions and bolt holes were the same for bolting up the tail housing. but the issue i imagine would be in changing out vavle bodies and if there is any machine work for oil passages internanly or if is even possible. Also didnt the A618 have a lower first gear than the 727? maybe the adapter and built 700r4 would be the way to go but i figured if the early cummins was in front of the auto OD in 91-93 and its being built to take the poer these days maybe it might have a little merit. but then again if nothing lines up internally its a mute point:barf:

No, it wont work.

The OD piston retainer is in the main trans case, not the tailhousing. Im also pretty sure the bolt pattern is not the same

makes sense thanks. i figured something was diffrent just was amazed at how closely the housings matched