More boost should help lower egts... yours seem really high to me, and the tranny temp is also interesting. I would run to the radiator then your aux. cooler, you want the trans to stay as close to 165 as you can get it. Does your pickup labor hard? I wonder if the tranny is slipping, causing the extra heat, and making the engine have to work even harder.

1150 just cruising at 1/4 seems rediculus to me, most guys dont hit that @ WOT roaling coal

 

Before hooking up my gauges I took a test drive and it didn't want to hold overdrive. I think the tranny is about shot even though it has less than 10k since a rebuild according to PO. Called the shop in Chicago that did it and they are no help. I have only made it throw a code once and it was torque converter slip and high oil temp. When I replaced the filter the oil was brownish. How much oil does the pan hold? I had almost 2.5 gallons come out of mine. If I turn the fuel up more would that help boost?

 

Not sure exactly what they hold, i know its about a case. Brown after a few thousand miles sounds like something isnt right.. Did they replace the torque converter? On a E4OD they can and do wear out as i understand it. With a rebuild though it should be replaced anyway. TC's are usually the first and biggest reason for high tranny temps, but not always. That was the only thing i could think of, and what you say kinda backs that, but im afraid i dont know of anything beyond that. Try a transmission shop, like Aamco, we just had one of our fleet trucks diagnosed and it was free, from what they said it sounds like it was a pretty thorough inspection, not just a test drive and guess.

 

Turning up the fuel more will increase boost and exhaust temps...

 

Thanks for the help these nice Oklahoma storms knocked out my internet had to wait till I got to work to reply. I think I am going to bite the bullet and have the transmission rebuilt by a shop I trust and have them do it with parts that will hold up to towing. I want to put in a DT 360 and would like a 7 speed but may keep the auto so the wife can drive it.