I had a wheel bearing fail at interstate speeds. Symptoms similar to what you are describing. Not pretty. $1100 fix. Turns out I could have done the work myself. Now I know. You should inspect everything up front. I understand these rotors should NOT be turned, as that will result in too thin a surface, and the calipers might push all the way out = no brakes. The only drums are parking brakes located inside of rear hubs.

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83 SD

84 CD