I found the information,as I searched a little further on the Internet,it turns out to be a fairly common problem which is, the speed sensors with the outlet being the most common one to fail but the inlet can also, a relatively cheap fix.
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As far as the speedometer not working and the transmission not shifting; I'd check the speed sensor connection on the tail of the transmission and follow the wiring to see if it is cut somewhere. If the PCM doesn't get a signal from the speed sensor, the transmission won't shift. Did the auto have wires get chewed by rats after sitting?
Chances are that the vehicle speed sensor has failed. This would cause all the symptoms that you mention. If the computer doesn't seen any speed, then it has no reason to shift the transmission up and out of first gear. And of course, there would be no speed shown on the speedometer.
The transmission quit shifting, and the speedometer quit working.
When you say the transmission quit shifting, do you mean you backed out of your driveway, started driving down the street, no speedometer, and you just stayed in 1st as the engine RPM's got higher and higher ?
Please explain what has happened. You should also have a check engine light on in your dash. You will have to plug a OBD II reader in to pull any codes, so we can help you find the problem. Please let us know.
Your issue is a bad "speed sensor". Your speedometer is controlled by a sensor in your transmission, and when it quits working your speedometer will not work, it can cause very irregular shift patterns and slipping. Replacing your speed sensor should resolve your issues.
I hope this helps you, and I wish you luck on your repair.
You have two sensor in the transmisson which is the in put and out put speed sensor, and is located on the left side of the transmission.
They are the primary input to the transmission control module which control your shift point and speedometer.
They are easy to replace and only held on by one bolt.
Disconnect the wire connector and then the bolt.
Replaceing is in revers and replace any fluid lost. If you could get it to the parts store and have the truck scaned, they could tell if you need both sensor or only one. Before you go out to the parts store, check the wire connections to see if there lose or broken which may be the cause of your trasmission problem.
Good luck and hope this helps and saves you some money
There are two things I would look at. First and least expensive is the neutral safety switch. It controls the shifting functions as far as PRNDL2L1. The other thing to check is the large bundle of wires that go into the passenger side of the transmission. Make sure it is in and seated.
If your check engine light is on and it is showing codes for the transmission, also check the ignition switch. They go out as well. The symptoms appear as starting out in 3rd gear with reverse ok or a touch of chatter.
Hope thi helps.