97 F-350 psd, I have a trans issue and maybe I could be redirected to another post. I have an intermitent o/d light flashing, with hard shifting, and a code [which I have written down and will provide tomoro] we replaced the solenoid pack ---the connector was leaking fluid etc. ---the issue comes and goes at random times, I believe it is an electrical issue somewhere,,,, when the light goes out, it shifts fine. any thoughts would be much appreciated.thanks.

 

If we had the code we can help you a lot more than taking a guess

Welcome to FTE !

 

Check all your brake light bulbs, especially the third brake light up on the cab. I know it sounds crazy, but it can cause this.

 

thanks already! I believe it is a code 1728? I would have to look in the morning. I have 2 awesome mechanics at my disposal.[when I get their time!] and plenty of scan tools and diagnostic equipment.... I just dont want to buy a transmission for no reason.

 

I take nothing lightly. I will check all the bulbs and connections, thanks.

 

My thoughts are that something is wrong. Without the codes that's as specific as I can get.

 

I had a buddy with that problem and the VSS was broken. New one and issues resolved.

 

I love having the option to disregard VSS circuit malfunctions.

 

the code is p1728.

 

* P1728 Transmission Slip Error

 

yes, exactly.

 

P1728 is often set in an E4OD because of a crack in the apply piston inside the torque converter. It can also set due to a speed sensor issue. If the vehicle speed sensor is bad and sending bad info to the PCM it will calculate a speed difference that can set that code. My money is on the converter.

 

Great info!! thanks. Im sure you could guess my next question......do I change the converter? maybe a heavy duty aftermarket ? I am trying to avoid a full rebuild. I very much appreciate your insight. The converter issue definately makes sense.

 

How many miles on the trans?
You might want to do a full build. I'd hate to see you put a 650.00 convertor in it a Dix month down the road the trans go out and the you have to replace the con. again

 

I agree, I just have too many trucks to take care of,and $ is tight. I might take the chance. Im not sure on the miles, I do know this is the third trans in this truck. thanks for all the info!