I have a 05 Ford F-350 6.0 dually. this weekend i was pulling 14k behind me and i whenever i get to a hill the egt goes up to like 1200-1300. trucks stock besides 4 inch sliver line turbo back exhaust no cat. if i hold that temp for any amount of time the turbo makes a screeching noise. as soon as i let off and get back into it it goes away but comes back in a few seconds. unless i keep it under 1200 degrees. Is it my turbo going bad? I just think the temps are a little high for a stock truck with aftermarket exhaust. Also my truck pukes alot like it soaks the wheel well to the point it drips off my mudflap on the driver side. Dealer told me that was a bad cap 181 bucks, I have to take it back to see if they will do headgaskets.