Greg wrote: "I was hit a couple of weeks ago. Head on. The other driver wasn't going very fast. But he did damage the bumper and the transmission radiator. Neither were too bad. Geico cut me a nice check for the damages. I can live with the bumper. But does the transmission radiator need replaced? It was pushed in a little bit. But it didn't puncture anything. Here is a image of it."
It does not look like it will effect the cooling that much. If it is not leaking, then leave it. You can possibly straighten the fins in the smashed section. They make a tool to do this with but you can use a small flat blade screw driver if you real careful not to puncture the tube part.
Sarge