it runs fine, just here the noise once in a while. and yes its an ex cab short bed. it was funny hearing the owner say its the suspension, when you brake hard or put a heavy load you here it kick in because it has z71 suspension haha. can tell he dont know what he's talking about. i would take off the driveshaft and lube the yoke but its not my truck yet. just hope its not a brake problem, got me guessing what if brakes get locked.