Ford shift on the fly - no 4HI
2010 F-360 6,4L My electronic shift on the fly will not engage in 4 HI. It will go into 4 low, comes back out into 2HI just fine, just no 4HI. I can manually lock the hubs and it will work, just not...
Forum Discussion
This isnt true. I had an 06. I had bad vacuum lines to the front, but it would still go into low. Basically it have me a 2wd low. I used this so the time backing my camper up a hill into my driveway. I never fixed mine on purpose. The vacuum lines up front are a common problem. Next time you put in in 4wd turn the fan up and see if it switched to defrost. This would indicate a vacuum leak.
Did that trick as well right off the bat, it does not go to defreost
