What "clip" do you mean. I've had both vehicles and can't imagine what this "clip" is. Write in again and be more specific.
Maybe. More information is needed. Both need to be from the same engine, four wheel drive or two wheel drive, similar year, etc.
Probably not. The 2500 has an 8 lug wheel, and I think the 1500 has a 5 lug wheel. I might be wrong though.
The auto would bolt up, but not shift properly due to different internal sensors and controls.
Maybe, it depends on the engine and year. For example if both are the same year, engine and two or four wheel drive, it will work.
What type of transmission fluid do I put into a 2001 ram 1500 four-wheel-drive drive automatic truck
It could have the same ratio or it could not.
Need to know the series (1500, 2500, etc), Standard cab, extended Cab, Crew cab etc and wheel base.
Yes.
No.
The 2012 RAM 2500 has rear wheel drive.
The 2013 RAM 2500 has rear wheel drive.
The 2014 RAM 2500 has rear wheel drive.