Mt3060 not going in gear when wet

[Whatthefak]

Anyone ever heard of something like this?

I'm looking at a bus but they say it won't go in gear when it's wet. I have no clue.

[PNW_Steve]

Not a symptom that I have heard of before but I can make a pretty good guess that you are getting moisture into a transmission electrical connector or into the TCM itself.

I would think that a failing connector is the most likely.

With luck, somebody smarter than I am will chime in ....

[Whatthefak]

That's kind of what I was thinking, but I don't know much about busses

[Miles O Roads]

Not a bus mechanic but I would pull all connectors for a inspection for corrosion and fill with dielectric grease and try again.

[Tryonis]

You can also pull codes just by hitting the up and down arrows at the same time. That may tell you more.

[dan-fox]

What's "wet"? Is this after a rainstorm, before a rainstorm, or trying to start after you've driven in the rain?

This is the use case that WD-40 was originally designed and formulated for; drying out electrical connectors. "WD" means "Water Displacing". Reviled as it is, it's still the schniz for curing wetted out distributor caps (as if anyone had one of those anymore). The residue that it leaves behind that everyone hates for attracting dust on surfaces is supposed to inhibit corrosion inside plugged-in connectors.

It's worth a try.