My Plymouth grand voyager 2000 does not shift, it is stuck on the first gear, do you think it could be the transmission control module?

Sticking valves. When is the last time you had the transmission serviced? Since it will shift when cold, I would suspect a valve body issue.

Your transmission need rebuilding. You can buy some TransX and pour it in your transmission. Make sure drive the car to help the TransX to work it way through the transmission then you should get shift reverse. If it does not work then your transmission is badly damage. So you will have to get it rebuild or buy a used one.

the check engine light should be on with a code P0700 present. This means that the transmission control module has codes in it. You will need a high end scan tool (not an OBDII code reader) to get those codes. Once you know what those codes are post them here and I'll be happy to assist you further.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Hello
The engine and transmission in this cars drivetrain are fully electronically controlled by a computer called the PCM (Power Train Control Module). Whenever a problem like this occurs the computer stores a record of the problem in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s)

On the transmission is the control module connected? From that point the connector on the transmission module follow it ,now is that harness junction connected(they should spit off) . If everything is connected with a scan tool they have to reset the index value,reset the tire do a transmission relearn and a battery quick disconnect. Before they can do all this you need to disconnect battery and put the terminal together, The old transmission adaptive strategy is still in the ECM,this is one of the challenges of voyagers rebuild and replace transmission Now you know why transmission shop dont want to do this work for voyagers

Hi:
This same thing happened to my daughter,s car, and it ended up being fixed with a transmission speed sensor. This sensor not only runs the speedometer, it helps tell the transmission when to shift too.

Trans is in limp mode. Speed sensor problem with the transmission. Take it to the dealer. I had mine done for 186 bucks.

Hi the Transmission control module is having communication issues with the sitting solenoids that actually preform the shifting once you initiate it by using the in car stick. these solenoids are inside of the transmission pan and you will need to replace them.

Please rate and god bless:)

Have the transmission computer scanned for codes. This trans is completely electroniclly shifted.

It's in limp home mode. You'll have to check wire connections and electronic controls. If it has a vacuum modulator you can remove it and look for trans fluid on the vacuum hose side (meaning ruptured diaphram). Double check the parts you replaced as well, especially if they were used parts. My dad went through three speed sensors in one year on his Caravan. You should drop the pan after checking other components. It could be a bad relay, shorted module or wire. The three speed transmissions are much more reliable than the four speed overdrive transmissions but with age and miles things can go wrong and parts will wear out.