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The rotor is
>beyond turning, and you gotta replace both on an axle even
>if you need one, right?
I don't see why,as long as there is enough material left on the old rotor after it has been turned to match the micro(finish)of the new rotor.
>
>They also tell me that the left front rotor has been 'over
>heated' and needs replaced. Has anyone ever heard of this?
I have heard of and seen overheated rotors.
> No signs of excessive
>pad wear nor of a stuck caliper.
That does seem odd.
> By the way, how do you
>determine that a rotor has been 'overheated'?
>
One sign is that it will appear discolored compared to the other one.I have seen drums and rotors with what's known as "hot spots" in them.When you turn a rotor or drum with them,the cutting tool will tend to ride over them and not cut.Years ago they used to grind hot spots.I assume they still can.
Hey Gav10, saw your posting about odd brake noise and had to respond. I have a 99 PSD and have had an odd noise every since I bought the truck. Of course the dealers cannot tell me what it is. Not noticed so much in braking as much as noticed at hiway speeds 65 and above. It seems to be mainly in the left front end. A deep rumble, causing me to back off on speed. Tires are good, just put new ball joints in truck, new alignment, put truck in neutral at speed of noise and is still there even when rpm's drop to idle. Popped off the hubs the other day on a clean road and got up to noise speed, still there. I am really suspecting a bearing problem. You or somebody was talking about rebuilding the wheel hubs? Curious about your thoughts. Thanks, Sleepe
The best to my knowledge you can't do anything to these sealed bearings. I my self have never heard of rebuiling these hubs. When my buddy had the problem it sounded like the same thing you are describing. The other thing he really noticed was a decrease in fuel mileage. He drives 65 miles a day one way back and forth to work, all interstate at 70 mph. He keeps a real accurate detailed fuel log. He saw the mpg drop the same time the noise started.