dangerous trebles

PTU on our 07 just went out at 95k, and also the baffle in the fuel tank broke, it was making a metal scraping sound every once in while. Also rear bearing was replaced at 82k

New hear to find out if anyone else has an sqeaking, rusty chain sqeal noise on their 2007. We have 95k on it, daily driver of 60 miles round trip Right rear bearing went out 1000 miles after warrenty, compalint to ford about telling them about noise for the last yr, no good, fixed at our cost Now a sqealing noice every once and a while not constant, not when breaking and is at all speeds. I crawled under near and thought the noise was from the metal guard that covers the fuel tank.... Can't find where maybe a rock is jammed in? ... Any other ideas. ford dealer said they only hear it when the brakes are used and want to do a full front brake job and turn the rear rotars, the breaks are in great condtion 6 and 8 mills, they think the shiny rotar is the issue, no thanks. We have not had any of PTU issues, but now I gotta check that.... thanks