Hey all. Im new to the forum. Im having a similar issue with a 2000 ram 2500 4x4 auto 5.9 gas motor. Truck has reverse and 1st gear only. Will not upshift. It has a CEL on i scanned it and it has codes for misfires only no trans codes at all. I just bought the truck knowing it had the trans issues. My question is can it still have this type of trans speed sensor issue without throwing a code? Any help would be great i need to get this thing on the road. Thanks!