Hi all, im new here. My name is Corey, I bought a 2000 gp gt. And as my first pontiac car, i love it. So onto my question, My gp has a bad trans. as it doesnt have overdrive. So I bought a 2001 buick regal gs for cheap that has a nasty rod knock. It has the 4t65hd trans that i will be using in the gp. My question is, if i top swap the gp with parts from the buick, will i be able to use the ecm from the buick and not require any tuning?