I have a 37 Packard 120 and am having problems with the brakes locking up. A very experienced mechanic rebuilt the entire brake system all the way from master cylinder to each and every wheel. He said the set-up process was very difficult. He followed the set-up and adjustment procedures as outlined in the Packard shop manual yet as he set things up, one by one he had to work at extensively adjusting each wheel because first one would lock up and then another and then another. Thought all were good to go and the car drove well for 100 miles and then this year for no apparent reason, the left rear locked up when coming to a stop at a light. More adjusting and seems to be working but based on its history, not confident the problem won't come back at the worst possible time. Has anyone had this problem? Is there a trick to setting up the brakes? As I mentioned, everything is new in the entire system. Any input would be appreciated. Hard to find people who still work on these older cars. Thanks, Bob