About the mds, does tow haul disable it? If so I could rule that out by driving in tow haul for a week. If MDS is the cause I’ll just let it clunk.
Yes it does disable it. Before I put in the light I could have sworn I still felt it kicking in but I think I was feeling the lock up torque converter. That is also something that could be happening. When it happens, how long did you say it lasts? What year is your truck? Also, make sure you're running the type of oil it specifies. For MDS motors it's 5w20. The MDS uses the oil in is deactivation process.
I'm no expert at this stuff. I've done stuff here and there, until I bought my ram (Which I love) and read about some of the issues that have caused catostropic engine failure. Since then I've been doing alot of preventative maintenance on it. I have never really taken too good of care of my vehicles, mostly because they were junk when I bought them. I played for that this last summer. My wife's timing belt went and slammed the valves into the pistons. One of the many reasons I love this forum are the Fellow dodge owners who go out of their way to help a fellow (complete stranger) owner out with tips, troubleshooting ideas etc.
As a matter of fact, after I post this reply, I'm seeking some help/answers about a motor I'm probably buying this weekend. Anyways, not sure if you've heard of torque pro but it's a 6 dollar app that uses a Wi-Fi or Bluetooth adapter that plugs into you obd2 diagnostic port. You can check trouble codes, clear them and see live data like 02 sensor volts, vacuum pressure, calculated hp and torque, etc. Best of luck and keep us updated!