Transmission issue?

[SeaDo]

Ok, we are on way to Florida and currently in Western Mississippi. It’s raining cats and dogs. My 99 Allure just dropped to 3rd gear and stayed there while we are on a level hey. The left window on the shift pad went blank. The dash lift came on that said do not shift.
After a couple of miles on this 2 lane us49, found a place to pullover, once I killed the engine and restarted, it seemed to reset and all is normal.
Any ideas 💡?
Taking a little break before heading back out.

[SeaDo]

Made it to a Cummins authorized and transmission shop. They are going to look at it tonight. Says it is most likely an electrical issue probably corrosion.
We report back when resolved.

[photopilot]

My SWAG is you got something wet, bad connector seal on the tranny as you said it was raining cats and dogs. The challenge is where is the problem?! I hope they can find it. Good luck.

Walt

[SeaDo]

Walt
After it had quit raining for about 30 minutes, starlit back up and drove about 30 miles to the shop at Oakland Mississippi and it worked perfectly.
Still going to have them inspect all those wiring harnesses and any thing else electrical that is exposed to the wet roads.
I would do it myself if I were home but we are about 600 miles from there and headed the other way... ��

[Smitty77]

Fingers crossed that they found something that they could address. Ground connections included in the harness check...

If they don't find anything, when you are back on your turf, an unplugging and spraying the harness connectors with electrical cleaner, letting it dry (Air in a Can cal accelerate this.) And a Q-Tip with a light dab of dialectic grease on the mail prongs before plugging backing, may help take care of sporadic problems like you're seeing.

(Suppose the shop will check the plugs, with more then a visual inspection, even unplugging and inspecting for signs of bad connections is a plus. And just the mechanical unplugging/replugging will cause a clean contact point between the pins and the female.)

One last tip, from a problem that persisted for an older Monaco Crown for several months. The owner finally traced the full length of the harness from from key pad to transmission, found an area where the wire harness had chafed enough to expose bare wire on two of the wires. He cleaned and wrapped the damaged area, and placed that section (And a few others.) in a protective piece of cut and slitted sections of water hose.

Please let us know what you find out, and have a good trip!!
Smitty

[SeaDo]

Ok
The shop didn’t find anything obvious and did not have the right adapter to run a diagnostic test to check for codes.
So we hit the road this morning and drove about 350 miles without any issues. Still concerned about it but hopefully won’t happen again before we return home.
If it does we will deal with it then.
Smitty I will follow your advice and clean all the connections
I would like to find a shop with the correct test equipment to check on the codes.

[Jean n Steve]

Let's hope you have dry weather the rest of the way, Wayne!

Steve

[SeaDo]

Hey Jean n Steve
Great weather today, drove on down just east of Destin Florida.
No problems,but, planning on stopping in Ocala Florida at the Allison shop and have it checked out.

[Jean n Steve]

Good deal!