[Alex V.]

I have one of the load-sensing prop. valves in the back of my '85 C3500, and I drive it unloaded a lot. It seems that, with that valve reducing rear braking effort, even a good hard back-up-and-slam-on-the-brakes won't adjust the rear drums and I have to do them manually or eventually put undue stress on the fronts, increasing the chances of warping them - which has happened twice in the last 40,000 miles. It's disconcerting to have your rear brakes locking up, but in part it's just the nature of the weight distribution on these trucks and I'd a rather have them stay adjusted and be prepared to baby it under adverse driving conditions.