Hi all, I have been tuning my truck lately, think I got a bit too aggressive and now I’m pretty sure my transmission is toast. Does anyone have any guidance with this? I lost all power to my trans after driving around (aggressively) about a few minutes after leaving garage I lost all power. I power cycled the truck and key and within seconds of starting the truck and putting into D, it runs and pulls then immediately slips and coasts as if in neutral. Also checked trans oil and found no particulate which gives me hope....

No pull in 1,2,D or R

Figured I’d check here before bending over to get raped by a transmission rebuilding shop. Thanks in advance all!

48re
2003 Cummins 2500