F150
Sounds like wheel bearings. Take your truck for a drive on an open stretch of road, swerve left if you hear a growling sound it's the right W.B. and vise versa. If it makes no noise either way unless your braking I would think about looking at something else. I've never heard of wheel bearings making noise only when you brake.
Last edited by jollyroger331; Jul 18, 2013 at 07:13 PM.

