Just plain weird problem. Always had a legacy DP tuner in my 2000 F350, normal person tunes, stock, 40 tow, 80 econo. Jody made me a good reason to upgrade to the newer chip with revised shift points. So, I was without a tuner for a week or so, having pulled out the legacy tuner and shipped it down to him. Got used to the lack of power and squishy stock shift points. I run about 150 miles a day for work and pull a (real) trailer about 60% of the time. Never had an issue with my transmission. Pulled my 12,000 lb skidsteer on my 7000 lb trailer (read: 19,000 lbs) saturday and sunday, about 70 miles each time - no tuner, no issues. Pulled a 6000 lb horse trailer with 2 belgian work horses (read: heavy) about 40 miles this morning - no tuner, no issues. Got my new DP tuner (drive thru, stock, decel, 40tow, 80 econo, smoke 140), installed it (truck off, key out of ignition), started up and headed to another job site, with empty horse trailer in tow. Now, I can no longer use my o/d button to turn off overdrive (or engage it). The button is functionally useless from here on out. For the last 80 miles, this is what I get - Stop for whatever reason, corner, sign, retart, etc. I will either regain overdrive function or lose it. Stop again, and it will work again until the next stop. Stop again and lose overdrive till the next stop. Remember, pushing the od button is a futile effort. Moving the tuner from any setting does nothing but gain or lose power from various settings. I even went to the attempt of removing the tuner, disconnecting the batteries and resetting the factory computer.

Here is the other clinker, When I start the truck, the OD OFF light will come on while the truck is in park, select another gear and the light will remain lit, but then the button will allow it to be shut off. As soon as its back in Park, the od OFF light will stay lit, regardless of button pressing. (this happens now with or withOUT the tuner installed, and has only happened since I installed the tuner this morning)

What the heck happened ?

 

Great question. Call Jody. He will help you sort it out. Subscribing to hear the solution.

 

Me as well

 

I'm thinking there's a glitch that occurred somehow when he downloaded the tunes onto the chip, since it happens in all tunes.

Stewart

 

Weird one, subscribing...

 

Pull the chip and see if it keeps acting up. There's an off chance that your OD switch wire decided to chafe through and short at the exact moment you decided to change tunes. Gotta love Murphy!! LOL

 

THats what I'm thinking. I call just an odd coincidence. Those wires are known to chafe and it may be fine in park only

 

I agree with Joe and Nic.

 

have you checked those wires?

 

gonna look tomorrow. may very well be just that simple.

 

ok. the problem exists with the tuner removed. This is a 100% repeatable problem - If the od light is on, come to a complete stop, as soon as you release the brake pedal, the od light will go off and all is well UNTIL YOU STOP AGAIN, then repeat.

There is NO life on the od button. Nothing. I tore the column apart today, the wires are fine, the button wires work fine with an ohm meter (push button in, closes contact, etc) No frays anywhere that I can fine. This is something else, but what !!!!

 

Since he said this:
I'm thinking the same thing, assuming he's run the chip with the chip removed and is still have the same issue.

 

got an update:

Upon advice of ford dealer, I ran code scanner, everything was good.

Here is the next indicator: With the engine running, the shifter in park, the OD light is lit. Pressing the button does NOTHING. Put the truck in ANY gear, the OD light stays lit, but pressing the button will turn it off and back on, like normal. Place the truck back in PARK, the OD light comes on and stays lit, pressing the button does NOTHING. NOW, PRESS and hold THE BRAKE PEDAL and pressing the OD button will turn off the light (and back on as normal). Release the brake pedal and the OD light stays lit and pressing the button does NOTHING.

I will find out tomorrow if the cruise control works. I will also find out if pressing the brake pedal will allow me to engage OD without coming to a complete stop.

Another week of this and I am putting a 6 speed in this.......

 

Or you could check for a chaffed wire first. I'd love to have a 6 speed too, but I wouldn't swap it if all I need was to figure out if I needed a button, a new harness for the shifter stalk, or new trans.

 

He did check all that bro. Ya missed his post.

Stewart