I just read through all of this thread because I just bought a '14 with a Roush super charger and when getting into the recent snow storm here locally I was on a dirt road and put it in 4Hi (always easily with no throttle, etc) and immediately began hearing the teeth on the IWE grinding, made a turn into my son's friend's farm taking him home and got the dreaded pop. So, I have purchased a new solenoid, new actuators for both sides and air lines. As soon as I get them installed I will report back to see if that helped or fixed my issue and keep up with how long it lasts. I will say though, on my 2011, I went through tons of miles of very high speed 4hi action at Havoc in the hills and Snoball 1 without issues. I did finally have trouble out of it but it wound up being a broken air line that I associated with my constant high speed sideways driving style that broke the line. Replaced the line, that fixed the issue, but I went ahead and replaced the solenoid and actuators for good measure because I was already replacing everything that could possibly have any wear on that truck.
Wish me luck, I will let everyone know how my experience replacing everything including the line goes, but I do indeed want the solid fixed actuator replacement that @
rptr has on his. I don't really care about mileage.
