Kurt,
If the brakes are sticking, they must be working. Are they properly adjusted? If they are far enough out of adjustment, they won't appear to work properly. When you have the rear up, if you pump the brakes, will the rear work?
It's unusual for the proportioning valve to go bad.
Let me know about the adjustment.
Joe
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Thursday, April 2nd, 2009 AT 8:46 AM