Since first receiving the code i have replaced the TCC soleniod, TPS, changed fluid and filter, and adjusted the shifter linkege. Nothing has helped. When i first replaced the TCC soleniod it helped for a while but soon went back to the rpms jumping 200-300 at 50-60 mphs. While replacing the TCC soleniod i changed the fluid and filter. Then about 2 weeks later i replaced the TPS. Currently when i reset the check engine light the truck will run and shift fine for a while (the other day i went 70miles before i had a problem) then the check engine light will come on while driving and the rpm jumps will soon follow. I then can reset the light and run again a while shifting fine before the light comes on and rpm jump reapper. So heres by questions:
1)Could my new tcc soleniod be bad? If so how would i know? I bought the solniod from NAPA and they will not exhcange it for another one so that i can see if mine is bad.
2) Could by torque conventor be bad even though the trans shifts fine for many miles?
3) Anymore answers to the code? I have read the about a 5 ohm wire grounding out in the trans. but i cant not find any information on how to check or find the wire.

 

I know you replaced the solenoid, but did you also replace the matching sensor? That is also a common cause of this code apparently (or so I was told when I had this code awhile back).

 

No i didnt replace the sensor that goes with the soleniod. I am not sure what your talking about. Can you tell me more information about the sensor.
By the way my truck is a 1997 2500 5.9 4x4. If that helps anyone help me.

 

There is a sensor that is attached to the valve body along with the solenoid. It is how the solenoid communicates with the PCM so it knows when to release the converter clutch.
Also, have you checked to see if you maybe have a bad electrical connection to the solenoid.

 

i have the same problem with my truck check out the thread i started on here a while back


p1740

 

i am planning on this weekend dropping the pan once again to check for loose connections and to see if some how oil has seeped into the conections. At that time i will look for the sensor. Does anyone know the cost of the sensor or has a similar problem with the sensor afther changing the soleniod. My TCC soleniod has 3 plugs to go to different places inside the pan.

 

The sensor may be part of the solenoid, i'm not sure. I was under the impression it was seperate. When mine was acting up, I was told I needed to replace both the solenoid and the matching sensor. It went away on it's own though, so I have never changed anything.

 

My torque convertor was shot. The clutch packing went through out the transmission so i got to do a complete rebuild.