Hello, I'm Chris.I will do my best to answer your question fast and accurate using the info you have provided. Thanks for visiting Just Answer.
So far there is no fix for this. The supplier of these coolers for ford has not felt the effects enough to build a better design. My wifes was leaking and out of warranty. So I saved a leaking one and resoldered the leak and placed it in my wifes and so far its 45k later and still no leaks. They all seem to leak on the passenger side at the 2nd or 3rd fin down so you could have one repaired rather than replaced to resolve this. I have replaced near 200 at my dealership since I am th trans tech and have yet to see any designed better than the last. Also since i am just a tech and there are no ford corporate employees here we have no answers as to when another manufactoror is going to built them any better.