Brake problem?

I'm glad you found the problem. You would have only been a dumbass if you would have replaced the master and not noticed the hub. :-D

I just did the wheel bearings, shoes and cylinders on my 74 Duster, they were the original stuff of coarse. My warning came from a severe vibration on the highway and a nasty shudder when I took the exit, I thought the front end was coming apart. Turns out my 47K original mile car had a right inner bearing race that was a pretty dark blue and my bearing rollers fell out of the race, it has a very shiny spindle too. The original grease was the consistency of roofing tar. Mine gave me warning enough to make it home without siezing up on the hub, yours gave you a different warning but got your attention just the same.