The previous owner installed an aftermarket grill. Is it possible that it's blocking some air flow to the transmission cooler and radiator? Here's a picture:

 

Possibly between the billet inserts (in both the upper and lower openings), the bull bar and aux lights you may have a little bit of an air restriction vs a stock setup.

 

The 1990's called and they want their grill back (sorry Stewart ), I truly doubt that billet restricts that your intake, NVA (net ventilation area) is most likely neutral.

 

The only reason I still have something similar (and I mean the ONLY) is because of the 4 offroad lights I have behind the grill.

Stewart

 

The only reason I still have it is because I have other things on my Excursion "list of things to do" that have a higher priority.

 

I run the Dorman 6.0L cooler I got from Rock auto on my 7.3, and haven't had one single issue. It cooled my trans down a lot too.

 

Dorman 31 row on ine and towed TT over Idaho and Montana pass with temps no higher than 170. My issue is high EGT's. The whole trip the tranny temp gauge ave 155. It was about 85 degrees the whole trip

 

I picked these up to connect the two different sized hoses from the factory cooler to the Dorman 6.0 cooler: http://www.ebay.com/itm/151294247465?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
Just curious if anyone knew of any reason that these wouldn't be a good choice for transmission lines/fluid? I wouldn't think there is, but I thought I'd double check here.

 

Stainless steel....... guaranteed to never shrink, stink, wrinkle, or rust ! They look as good as the brass ones on Amazon.

 

These are the best, exactly what I used too.

http://www.ebay.com/itm/2-FOOD-GRADE-STAINLESS-STEEL-3-8-x-1-2-BARB-SPLICER-FITTING-REDUCER-ADAPTER-/151294247465?hash=item2339d70229

 

That's good to know. I originally bought some brass ones, but it turned out that the 1/2 inch barb wasn't. I don't know if it was a PEX fitting or what, but it didn't fit tightly into the 1/2 inch ID hose. Plus, the two sides were screwed together using an O-ring. Id rather have one solid piece and less chance for something to leak.

 

I just ordered a set. Thanks for the info.

 

Glad I could help.

 

I replaced our stock V10 2002 Excur 4 speed 4R100 cooler with the Dorman 918-216 31 row trans oil cooler that is used with the 5 speed 5R110W and it works great. We tow on the west coast where it can get up to 115 deg. The 5R110W cooler uses 1/2" tubing which reduces the cooler line pressure even though it is a much larger cooler. This allows the option of adding a 3rd cooler or a filter without increasing the cooler line pressure above stock. If the cooler line pressure gets too high the bypass tube can kick in.

 

Just ordered a set too. Thanks for the heads-up!

Jay