Will your 96 v-8 transmission for a Dodge Durango fit in 3.9 6-cylinder it is 97?

No, a 1996 Dodge Durango V8 transmission will almost certainly not fit in a 1997 Dodge Durango 3.9L 6-cylinder. The bellhousing (the part that connects the transmission to the engine) will be different, and the internal components (gear ratios, etc.) are designed for different engine outputs and torque characteristics. Even if you could physically force it in (which you likely couldn't), it wouldn't work properly. You need a transmission specifically designed for the 3.9L 6-cylinder engine.