So, here is the deal. I am having some issues with turbo spooling. But, its not normal, nowhere near normal. I have had quite a few issues with my truck, finally got it running normal, and it has been for several months. So, a friend of mine, who is a mechanic suggested adding a couple ounces of transmission fluid to my diesel fuel along with my standard addition of Stanadyne, Diesel Kleen, etc...Well, I did because as many of us know, this was a fairly standard practice by many diesel owners days ago. So, then my issue starts. It had been pretty cold by South Carolina standards many mornings, and the truck ran fine, turbo spooled normally, all was well. Then, in the afternoon, on the ride home, when the days warmed to above about 55 degrees, and the truck got hot, it was as if the turbo did not spool properly. The boost/spooling was slow, and have a bit of a surge, nothing major...between 17-25 psi and then back down to just a few pounds for the rest of the trip home. The next morning, the truck is back to normal. No surge, good, consistent spool. Then, on the trip home, if the temps have risen above 55, the turbo issue starts again. But, on days that the temp does not get above 50-55, there are no problems. The truck is throwing no codes. I have gouged it several times and it seems to "cure" the problem for the rest of the trip home, if not for a few days, and then it starts again. My logic tells me that the transmission fluid may be leading to some "coking" or sticking issues within the turbo. Fuel mileage has stayed up. The only other thing I have noticed is when the speed is below 45 and I am driving uphill, I hear a sound a bit like a 5.9 Cummins(minus the vibration) coming from the underside of the truck/backside of the engine. I have checked the oil levels. No leaking of oil. Oil pressure is good. Checked hoses and intercooler boots for cracks. Those were good. Checked hose to map sensor. Checked air filter, it was clean. Checked the braided oil filler tube to turbo...Clean and oiling properly. Pulled the truck onto fresh cardboard after cleaning underneath to check for drips/leaks...nothing. I am at a roadblock here and I need some help. Anyone have any ideas? In case you were wondering why I checked the hose to the map sensor from the intake manifold, it was showing symptoms of issues with the MAP sensor which I replaced about 2 years ago, and I feel the issue could be related to pressures or the transmission fluid in the fuel (Which I will never do again). Any thoughts are appreciated. Thanks in advance.