Join Date: Dec 2012
I've had the same issue once and awhile with my 2009 as well after the 2" lift and a cortex tuner aswell. I don't recall it happening though since installing the Tune and correcting for tire size (I'm only running 33's though not 35's). It seemed to happen more when turning and going over a bump (from road to sidestreet with slight bump) that it would kick it on. I'll have to check and see if it does it next time I'm out in the same spot it was always doing it before the tune.
If the mud ain't flyin' ... You ain't tryin'
2009 F-150 XLT 4x4 4.6L 2" Ready lift front and rear
1989 Bronco II 4x4 2.9L 6 - 8" skyjacker lift front and rear
1987/89 Bronco II 4x4 work in progress. Full size Dana 44,Ford 8.8 5.0L swap coming