Speedometer not working on my 1998 Dakota, had transmission rebuilt.

dakkota65

1998 dodge Dakota

thecardoc3

In order for the computer to command the transmission to shift, it has to see the vehicle speed. The PCM/TCM also sends that signal to the IPC. So with the information that the transmission doesn't shift, someone needs to pull codes from the PCM/TCM and confirm if it is receiving the output shaft speed signal or not.

thecardoc3

Did the PCM have to be repaired/replaced when the transmission was repaired? Has anyone pulled codes and monitored data from the PCM, TCM and IPC?

Mr_Shiftright

Is your ABS light on as well?

dakkota65

hi yes the abs light is on , no they did work on the pcm

dakkota65

its stuck in third gear and speedometer is not working

dakkota65

well they got trans to shift , but no speedometer , he said the wire harness was bad and speed sensor was replaced, still trying to figure that out

Mr_Shiftright

If your ABS light is on and the speedometer isn't working, chances are pretty good that the speed sensor in the differential is bad---did they replace that one or some other sensor. The differential speed sensor is a simple fix--20 minute job.