I have a 2014 Ram 2500 with 175k miles. It's been deleted since 80k with no issues. I have the MM3 tuner, fleece cheetah turbo, 5 in exhaust, pusher intercooler tubes and intake horn. I was pulling my gooseneck over the weekend empty and slowed down while someone was turning, and the truck jolted a bit, and I had no drive or reverse as I was able to coast off the road. The fluid is clean and pink/red and doesn't smell burnt. I run Amsoil in everything underneath the truck. There have been no signs of slipping or shuttering ever. I towed it home, unplugged the tuner and took off the neg battery cables to reset the computer and still nothing.

Anyone have any insight?? Thanks in advance.
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how did you work that out