Not trying to be mean or anything, but most trannys are pretty much the same on all trucks to remove and install. If you do not have the skills or knowledge to do this you should not attempt it or buy a book to learn all the lines and connection you must remove and the proper procedures.
No
NoNo
1994-2002
Mopar ATf+4
NO. The 1998 has a electronic governor while the 1994 has a mechanical governor.
It may fit, but the control systems are different and it will not shift.
sounds like to me your transmission needs to be rebuilt
A 1995 should work.
The part number is 2118350
O2 sensor or vacuum leak
In 1994, Dodge used Emerald Green Pearl Metallic.
Not exactly. The motor is the same, but the transmission is different. The B vans with the 3.9 used a mechanical 3 speed automatic (32RH), the Dakota used a 4 speed electronic automatic (42RE). You could use the engine but not the transmission.