I just picked up a 1992 ranger x-cab 2wd with the 3.0 and a auto tranny. I was driving it home yesterday and noticed that the rpm's were kinda high at highway speeds, so i shifted it down to "D" from over drive and there was no change in engine speed and no downshifting feeling that you would normally get from taking it out of overdrive. so im guessing its just not going into overdrive. Ive had many rangers and i also had a 89 bronco 2 with an auto tranny and it did something similar to this but it blew a head gasket on the way to get the tranny looked at haha so needless to say i just sold it after that and never figured out the tranny problem. any help is apreciated