Having replaced rear main seals on two Rodeo's and an Amigo,
I would say the engine would be a lot easier to take out without the transmission attached. I am about to replace an engine in a 99 Rodeo, I will let you know how it goes.

'94, and '00 Amigos and '00, 01 Rodeos. Rodeo springs and aftermarket 'hard top on 94. Aisin hubs OME 919's on the 2000 Amigo. 2000 and 2001 Rodeos have OME 912's and Aisin. Smoother ride with the OME 919's???