Hi, Scotty. I have a 2014 Honda Odyssey Touring with 100,000 miles on it. The transmission usually runs fine, but when it gets really cold out, like 20 below zero, a weird problem occurs. Even if I plug the van in and warm it up for 15 minutes, the trans will slam from first gear into second. The rest of the shifts are normal. No matter how far I drive, this continues - even when the engine is at normal operating temp. BUT if I park the car and shut it down for even 5 minutes, it shifts normally as if nothing was wrong. I had a routine trans fluid change the first time this occurred and it cured it for a while. But it came back a second time so they did a triple flush and reprogramming. It cured it for a while but it just came back again. Is this related to water in the trans fluid, that came in by the air vent (maybe from condensation, never ran it in deep water) or something else? Thanks.
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Bubbleboy
Even if I plug the van in and warm it up for 15 minutes,
warming up the engine 15m will not warm up the transmission fluid all that much.
It sounds like you just have quirky transmission with a worn out hydraulic part inside (they are quite complex), and the problem is being exacerbated by cold fluid.
Next time, as an experiment, trying warming up the vehicle with the parking brake set (and maybe chocks for safety) and the transmission in 'D'. This will get the torque converter going, which will warm up the fluid much quicker. I wouldn't do this on a regular basis though because it's risky.
