I have a 2001 Trans Am. It's stock. with an auto tranny. For some wierd damn reason it overheats when I go down the highway faster than 65mph it won't even get to 220 degrees at any speed below that. It never overheats in town. It does it especially quick when I have the A/C on also. My fan works. It's really annoying, and I want to figure it out.

 

Did you remove the air damn under the radiator?

 

I just went and looked and it's not there. The body shop must have left if off when they fixed my car.

 

that's your problem

 

thanks guys!