will the transmission from a 2001 durango with a 4.7 l engine, 4x4 work in a 2000 dakota with a 3.9 l motor,4x4?

 

No it won't.

 

is it a bolt up difference or a wiring difference? what will wok with the 3.9?

 

The 4.7 has an entirely different transmission model IIRC.

The 3.9 and 5.2 have the 42/44RE, which is an A500, which is an overdriven and electronic TF904. The 5.9 gets the 46RE, which is an overdrive and electronic TF727..

 

Yeah so basically you're looking for a 42 or 44re which there are a ton of out there. A lot of older Rams, Gen 1 Durangos, and of course Dakotas.