Plenty of salt up here in the winter time. We're in the mountains, so in the winter there's salt everywhere. The rear backing plates are mostly gone, indeed. I had to cut the bolt for one of the rear swingarm links too, wouldn't back off even with the impact gun. Aside from that they weren't too bad.
It threw a pad off the rear and destroyed that rear rotor. Has to be about the worst one I've ever seen.
Lol, yeah, the late model Chevy trucks seem to love eating rear brake rotors. They get rusty and start to flake apart which ends up tearing the lining off the pad. It gets much worse when the backing plates rot off. Then there's nothing to shield the rotor from the water.
Wait until you get to put a thermostat in it. :boss: