I have a 3.1 lumina that went in the ditch. It was driven for a short while after and the transmission quit working. Looking underneath we found that a transmission cooler line had pinched off. Could it be possible that replacing the line will fix it? Looked at the fluid and it is still bright red and doesn't have a burnt smell to it or anything. I know I can just try it and see what happens but it's buried in a snowbank right now. Just trying to get some ideas as the snow is melting now and I will soon be able to get at it to work on it again.

Wrong forum this is going to the Lumina forum.

hard to say what's up without dropping the transmission pan. the cooler line may have cracked at the bend which also might be a system blockage as well, giving you a leak, but no entrance to the tranny itself for cooling.

i'd get the car home, drop the pan and have a look. if everything smells/looks good, replace the bent line and hope for the best. good luck!