96 Powerstroke, after it warms up the transmission sometimes shifts hard between 1st and 2nd sometimes it doesn’t. The other day when it shifted from 2nd to 3rd it acted like it was in neutral. I shifted to neutral and then back into gear with no change. I pushed the overdrive button and it then shifted down and then back up into 3rd. After I had no more problems the rest of that trip. This seams to be a common event when the truck get warmed up.

A couple of weeks ago I was having issues in overdrive where it would shift down and stay there with my O/D light flashing and stay that way for about 2 miles then it would clear up. I borrowed a friends snap on modus scanner as it didn’t have any transmission codes stored. Any body have any ideas?? I’m at a total loss, thinking more electrical or valves sticking, fluid is good and not burnt.

Used a Snapon Modus tool. No codes were found. Called a transmission shop they said that on these trucks the transmission codes don’t store and that they erase when the truck shuts off. I have ran the truck hard this weekend, and it hasn’t acted up. This just seems to be so intermittent, but enough I don’t want to take the truck far from home.

I guess I’ll drive the **** out of it and then rush to shop and see if they can pull codes when it shifts hard, and won’t shift up when I acts up again.