Random shifting in wet conditions

[grouchotoo]

I've had this problem two or three times when driving in very wet conditions. The tranny will randomly and rapidly upshift and downshift.
I have a '07 Winnebago Adventurer with a 6-speed Allison.

Has anyone else had this problem or know anything about it?

Thanks.

[az bound]

You may get a better response if you post your question in the allison trans. forum.

[Mike Canter]

Since you state it only happens in VERY wet conditions indicates that a plug or connector is getting wet inside. Check all the plugs on the transmission and make sure they are tight. What happens to the speedometer needle when this random up and down shifting occurs is the neddle steady or moving up and down?

[grouchotoo]

Thanks to Mike and AZ Bound for your responses.

I'm new to the forum and I thought I had posted this in the Allison forum. I guess not.

Anyway, I didn't notice any significant change in the speedometer or the tachometer when this occurred. I'll check any wire/sensor connections and see if there's any chance for water infiltration.

[az bound]

I think it was my mistake, its in the allison forum. Curious to see what may be causing this.