I got the montero back after full tranny flush and filter clean. Guys at the shop test drove 3 times no shudder. I left out from the shop accross town and it drove like a new one no shudder at all. About half way home I stopped for a light and traffic then took off when it changed, truck would not shift out of first gear. Pulled in parking lot and tried it again 3-4 times would not shift out of first. Parked it and got a ride back to house. Deal with it in the morning.

Well this morning I went to check it before getting it towed and guess what ran like a new one again. Although I did feel a slight shudder during the ride back to the house.

These unpredictable random problems are killing me. I willgive the TPS sensor unplug a try if I can find it.