I have a '17 f350 that wont shift into 6th gear every now and again. Does this have something to do with Regen? The truck has about 10,000 miles on it now and it's only done it a hand full of times. The last time it did it, it stayed like that for about 30-35 minutes. Every time the truck had to be shut off and restarted for it to go back into 6th.