I had my IWE's (front auto locking hubs) go out on my 2016 F150 at about 45000 miles. Symptoms included a metallic clattering noise when driving in 2H, usually on acceleration, also trouble engaging 4H or would not engage at all. They were covered under the factory powertrain warranty and replaced by Ford. This is apparently a common problem since the IWE system was introduced. I have read elsewhere that it has happened for the first time on low mileage and high mileage trucks. I was advised by the dealer here in CO that if let go too long then the IWE can cause failure of the front hub assembly and that is NOT covered under the powertrain warranty. It would be replaced at the owners expense.

 

 

techrep:
Thanks techrep, The service adviser at Groove Ford stated that if the hub assembly was bad, not just the IWE then I would be responsible for the hub replacement stating that sometimes the hub assembly goes out as well. IWE would be covered no matter by powertrain warr. Just passing on exactly what I was told. Only the IWE was bad on mine so all resolved under warranty.