If it's the same type of transmission that came from/is going on the same engine, yes.
NoNo
No, the bell housing pattern is different.
its on the front of the transmission, near the trans pan
1996
Your transmission has a pin type connector. A switch to spade connectors was made in the later 1999 model Caravan. Thus, a '96, '97 or '98 trannie will fit your 1998 3.0 Caravan. Pre-96 bolted up differently, so anything older will not work.
A 1997 Dodge Caravan is fuel injected, not carbureted.
1234
There is no gasket between the engine and transmission. The torque converter inspection plate does have a dust seal on it.
no
1996-2000
Thru the transmission dip stick. You will need a nice sized funnel, with a big mouth and a small base for faster pouring but any will due as long as it fits.
It does not have a modulator.