I have a 2007 f-250 6.0 liter turbo diesel. I was pulling a trailer with a golf kart on it and was not in tow haul. I was going up a hill and it shot up into 5th gear. I pulled into my house and shut it off and refired it and it acted fine. I went on a little test drive to see if it was going to do it again before I went on my trip. As soon as it shifted into third gear the tow haul light started to flash on my dash and went to 5th gear and would not down shift even if I did it on the column. I scanned the truck with my snap on modus and it gave me these codes. P0706-transmission range sensor A circuit range/performance, P0707-transmission range sensor A circuit low input, and P1702-transmission range sensor circuit intermittent. I put a transmission harness in it and started it up and it ran fine and the codes were gone. I went for a test drive around the neighborhood and as soon as it hit 3rd gear it did the same thing as before. Today I put the old one back in and checked the codes so I could write them down and there weren't any so I went for a drive and it shifted through all the gears great and downshifted fine as well. I pulled into my drive way to check for codes once again and there weren't any. I was gonna go for a ride in tow haul to see if it would do it and as soon I put the truck in reverse it started to idle high and the tow haul light started to flash again. I put it in drive to pull back into my drive way and it immediately shifted into 5th gear and threw the same codes

 

I suspect a bad transmission range sensor.

 

I must be learning a thing or two. I was thinking you would say that.



Sean <BR>

6.0L Tech Folder

 

Since your 3 codes all point to the range sensor I'd say that a safe place to start.

 

Here are the PDFs for replacing the range sensor.
There are 2 roll pins that you have to be careful with. The one that goes into the
case can be very problematic if you don't have the correct tool to pull it out. It's
in a blind hole and must be extracted. So if you want to tackle this do your self a favor
and get the correct roll pin extracting tool.



Sean <BR>

6.0L Tech Folder

 

and becareful a range sensor may leave you stranded


if it thinks its in gear it wont let the starter crank