Will a 47re from a 2003 4x4 diesel work in my 2000 4x4 diesel ? 

Yep they are the same.

2 minutes ago, Cowboy said:

Yep they are the same.

Thank you !

 

Neutral safety switch is different.

2 hours ago, Dynamic said:

Neutral safety switch is different.

That is correct,  do you know if they’re are any adapting options for that? Or are you stuck not using it?

No, there really is no way to adapt it. The 3rd Gen uses an actual range sensor, which has varying resistance based on position, while the 2nd Gens just used a switch for Park/Neutral.

 

There would also be no reverse lights if a 3rd Gen transmission was installed in a 2nd Gen truck.