So I bought a 2008 3500 with the 68fre. It was deleted and had unknown efi live tunes on it. I used the autocal that came with the truck to load the stock tune back in. I installed an H&S Mini Maxx with the Overdrive tune. It ran and shifted good for about a week or two, then I started getting a noise on the 6-5 and the 4-3 downshift. It didn't do it all the time, mostly with tow haul and the exhaust brake on. Found a scan tool and did a quick learn on it, drove it for another few days before it did it again. Returned the truck to stock and loaded the tune on the autocal back in and did another relearn on the trans. Drove for a week and a half before hearing the noise on a 6-5 downshift. Anyone ever run into this? Its hard to describe the noise, not really a grinding or a high pitched squeak, sort of a dull noise that only lasts about a second if that. Truck still shifts fine and the fluid is clean, the dealer said it had roughly 6k miles on the transmission rebuild.