We had almost the same problem on our 2013 F450 at about 4,000 miles. One front flap tore off in a diagonal pattern when we were driving I-90 in SD. We had hit nothing. Ever. Not covered by warranty said my dealer. Annoying.

I have a 2013 F450 and both front flaps tore off by 2500 miles. I just got the factory replacement and will install them soon. Sounds like it will happen again. I've read others and everyone likes Duraflaps so I'll try them next.

Find a way to stiffen the flaps. Anything behind them that will limit the bending will help. Thats why alot of the truckers have chrome emblems on their flaps.

Thanks Jim, but I think it is just the opposite. The flaps are molded plastic & I believe they are too rigid & the constant vibration of travelling down the highway causes them to flex in their weakest point, the crease at the body line. Just as if you take a wire & bend it back and forth until it breaks off. I believe it is poor design on Ford's part. If they were rubber like truckers use, the ones with the stainless weights, they would not have the weak spot. I started this thread to gather info to argue with Ford. I compared the f450 & f550 front flaps at a dealer and they are different yet share the same mounting area. Both were formed plastic with the f450 being longer by 2"-3". I don't know if 550's are having problems though. Thanks to everyone that has commented, at least I know its not just me.

I have a 2013 F450 and both front mud flaps ripped. Going to check with the dealership about warranty replacement. I suspect I'll be purchasing Duraflaps in the near future. Sounds like Ford needs to step up to the plate on this. I'll be taking all these posts with me to the dealership.