Excursion overheats&leaks tranny fl towing going 50,uphill

I have a 2000 7.3 and just did 4 glow plugs 6 months ago. I'm a powerstroke.org member also, and learned of the connector under the valve cover. If you google the 50 cent mod, you will see that there is a quarter size "coin" with 1/3 ground away. You then slip it into the connector to keep it locked together. Ford actually sells this part, but 2 quarters on the grinder is easy and cheap, hence $ 0.50 mod.