I have a 2011 F-150 XLT with new 5.0 in it and when I am backing up (usually in cold temps outside) my rear end clunks a few times when hitting the breaks.. its only right away when I leave for the first time in the morning or when its been sitting a while and I back up.... any suggestions guys or this happen to anyone else? I live in North Dakota so i am not talking 40 degrees here ... usually makes the sound when its under 25 i suppose.

 

my brakes do this afters theres been moisture because i have aftermarket pads that are made of a different material. if its your brakes just clearing the wet dust off of themselves i wouldnt worry. if it is actually your rear end then i would start worrying.

 

Thanks jdeacon, just dont want to pay and bring it in for them to say its nothing...