[JL8Jeff]

My old 4Runner did the same thing when the rear line blew out and my Silverado had the same feeling when the line blew out. Even though the circuits are supposed to be separated, the rear does not actually start to brake until the piston is a certain distance into the master. And if the master doesn't have the fluid to pressurize, you get pretty much nothing (from either end). It's not a good feeling to lose brakes but you better hope your parking brake is up to the task in an emergency situation.