Well today I took a little stroll under the truck and decided to do a little tracing from the tranny O/D solenoid to the engine and well, I wasn't impressed. All the factory tape was coming off and was rubbing against random things. Nothing looked to be rubbed through to the wires but some of the rubber seemed to be a little 'thinned'. After checking all that I taped them up nice and tight. Now once that was all said and done I got out the multimeter and tested for power in the solenoid(meant to do this first). Anyhow instead of getting a solid BEEP... I was getting beep, beep, beep and so on when I moved the prongs around in the contacts. The other solenoids I looked at gave me a solid steady beep but this one seemed to not be getting steady current. I greesed this back up and put it back together. So now my next question is, what do I do now?

Mike

 

If your truck is shifting in and out of OD then do a search of this forum for TPS (throttle position sensor). That may be your problem.

Here's how I fixed mine (For about $2.00)
CLICK HERE

 

Yes I've posted several posts on the upshift and downshift problem. I've now finally decided to attack it.

See I've replaced the TPS and checked all my solenoids via computer so it's all just a gamble now.

BTW you wouldn't happen to have any pictures of that little setup now would you? Oh and this is for manually shifting your truck in and out of OD, correct?

 

Sorry, no pics - sold the truck. Getting ready to buy a 1st gen 4x4.

The potentiometer (****) mounted on the dash is basically just moving it inside the cab. The **** allows you to adjust the point at which the OD solenoid kicks in. You can adjust it from about 35 to 50mph as I recall.

Even though you replaced your TPS I wouldn't be surprised if that's still the problem - they are a known EXPEN$IVE P-I-T-A. Good luck -

 

A-Poc, Ah, the lovely overdrive dilemma has struck you now too!!! When mine started to go, I replaced the TPS to no avail, then figured out it was the wire connector at the TPS. So I went in search of a pig tail to crimp on to fix the problem. I learned that there was no such pigtail available, I'd have to buy the entire engine harness for a mere $350.00+... So I managed to jimmy rig the old connector back into working mode for a while. Then the connector on the transmission for the solenoid did the same thing, fixed that one with one I robbed from the water in fuel sensor on the fuel filter (I don't reccomend this, you won't be able to tell when you have water in the filter) and the problem went away. Finally the TPS connector gave up completely so I simply wired in a switch to manually control the overdrive. What you do is find a good reliable ground somewhere, and run a wire from this ground to one side of your switch. Put the switch in a convenient location (Mine is on the steering column below the turn indicator switch) and run the other end down to your transmission, and connect it to the ground side of the connector going into the transmission. I left the old ground that's controlled by the computer there because if I ever do manage to fix the TPS connector it'll work like it should... The wire you want will be orange with a green tracer. Make sure you don't connect this ground to the other wire or it'll short out and cause all kinds of headaches. I did end up having to replace the connector at the transmission too, but they are fairly common on any chrysler vehicle, just march yourself into your local wrecker armed with some side cutters and have at 'er... Hope this helps, let us know how you make out.
Toby in Squamish, B.C.