2018 RAM Cummins 3500 Aisin Trans Problems!

[Mortifera]

Ok, I am gonna update this thread because I hate when something isn't closed out. I have not been able to replicate the issue but I think I may have figured out what happened. My phone is located just above the shifter arm on a little platform I installed on top of the radio. I was accelerating onto a highway when it occurred while simultaneously reaching for the screen to adjust the brightness down. I think my hand partially knocked the thing into neutral. That's all I can think of because I KNOW I did in fact bump that thing but didn't think it had anything to do with the failures. But, since I haven't seen anything pop up again and I just drove to Dallas and back with zero issues, I can't think of anything else. Anyhow, I did regain some appreciation for my truck again so that's always good.

Now, if I can only figure out how to set the cruise speed a little higher. Mine maxes at 85 (no you can't bump it up from there) and my tire size isn't nailed down correctly so I can only go 82-ish. Which, now that I think of it, could ALSO have done something to send codes. Not sure haha. Probably kept me from getting a ticket, though! LOL.

Edit: thanks to a certain person in this forum, I was getting about 17.8 MPG at 82 MPH in a 3500 with 37 inch tires and a lift and carrying 90 gallons of fuel made it so I got there and back on 1 fill-up. God I love being able to do that. Especially since I can get my first 30 gallons at 25c off then the rest at about 3.05. That's pretty damn good for El Paso area, btw.

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[Mortifera]

Ok, after about 60-ish days of no problems, I had the problem again.

I was driving up a hill and went to pass another vehicle.

After stepping on it, the transmission went to downshift, and it felt like somebody rear-ended me, and then I had nothing.

I was cresting the top of the hill and was able to coast to a larger shoulder and do some trouble shooting.

I had two codes: U010E and P0735. Might be time to call revmax.

EDIT: This time, I did NOT bump the shifter.

Also, I would like to add that when I shift into drive, the P R N D lights turn yellow unless I find the right spot.

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[AK Bob]

Ok, after about 60-ish days of no problems, I had the problem again.

I was driving up a hill and went to pass another vehicle.

After stepping on it, the transmission went to downshift, and it felt like somebody rear-ended me, and then I had nothing.

I was cresting the top of the hill and was able to coast to a larger shoulder and do some trouble shooting.

I had two codes: U010E and P0735. Might be time to call revmax.

EDIT: This time, I did NOT bump the shifter.

Also, I would like to add that when I shift into drive, the P R N D lights turn yellow unless I find the right spot.

The U010E is normal when deleted and nothing to be concerned about.

Did you go through the troubleshooting checks for P0735 code listed in post #6? Could be a speed sensor or transmission harness connection issue.

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