When I got my truck I noticed that my fan shroud was not the original shroud. I'm pretty sure it is from a N/A engine because the previous owner had to cut away on the bottom to keep the fan from hitting it. This leaves a way for air to get out when driving slow or at a light. When I'm driving my a/c blows cold but when I am at a stop light or what not it doesn't put out as good and on a day close to 100 degrees it really annoying. So do you guys think this could be part of my problem or should I go ahead and first have the a/c system checked out. I put a can freon in it so i know it isn't empty or leaking. Also does a ford lightning shroud fit our trucks also. I checked the price and it looks they are close to 250 bucks. Hopefully someone has one laying around that they can sell me.