i have a 03 3.9L dakota i had the trans bebuilt at 77xxx miles and 11xxx mils later its goofing up on me my check engien light comes on i dont remember what the code was if you need it i will get it but this is whats going down when the trans is cold it shifts just fine when it warms up i will only have 3rd gear i can mannually shift to 2nd and if im lucky if i put it in n before i stop i can put it in 1st and shift up from there to drive i took it to the trans shop and they ran there computer for me and what it was doing is saying that my ecm did not know what gear it was in if you put it in first it will say 4 ect. i already replaced the transmission range switch whitch they said that that might be the problem i need help

 

You should have a warranty still no??

 

I had similar issues with my R/T, have you checked the sensors on the tranny? thats what caused it on mine. I dont remember the exact name but I believe there were 2 of them.

 

do you remember if they were inside the trans or out side the trans i replaced the transmission range switch that one is on the out side of the trans

 

i only got a 6 mounth and 6000 mile warrenty im out sid the warrenty

 

from what you have described, I doubt you have a faulty transmission.....get that code.......it will narrow the field of what to look for.......since it has to warm slightly for the problem to occur, it sure sounds like a faulty trans control module....however do not replace it on just a hunch cause they are usually kinda pricey.....


Brian

 

yea the power train contrrol module is over 200 the code that it reads i p0748 witch is the governor pressor switch of open ceircit that all i can remember right now what it said

 

P0748 is a problem in the Gov pressure electrical circuit.......Possible causes are Transmission relay has lost voltage or is bad.......wiring from solenoid/sensor is shorted or open to the PCM or the PCM has failed.....

Brian

 

well i know its not the relay nor the fuse i checked those and there fine i guess the next step is to replace every thing in and on the trans unless you guys have a better idea

 

Unless someone has changed the filter lately and perhaps pinched the harness, i highly suspect the PCM....I would look for a donor PCM.........Get the service number off of it and search one out.....I have seen this a few times and most of the time that is the culprit....But it can be any where in that circuit....

Brian