First, where was the car manufactured? If it was manufactured in Venezuela, it may not have the same axle that would've been optional if it was manufactured here. I know Chrysler V.a imported the parts from Chrysler USA, but there were substitutions at times of parts shortages and gov requirements to add local content. Pics of the rear axle assembly cover (what you're calling the rear transmission) will help the most.
It could be a Banjo type like this:
View attachment 1716247706
View attachment 1716247707
Or a removable cover type like this:
View attachment 1716247709
View attachment 1716247712