Self adjusters
I've owned several vehicles with Dana full floating rear axles. Also managed a small fleet of super duty fords with the same Dana axles. Very few of them self adjust properly. Backing hard and barking the tires, or using the E-brake, they just do not self adjust correctly. I even changed out the lever that moves the star wheel, and the star wheel, no luck. I've run them dry, with penetrating oil, grease, antisieze, you name it, no difference. I perform an adjustment about every 10,000 miles or so, or before I tow heavy. You can tell that the brake pedal gets a little lower as the adjustment goes out. I have had some, including the drivers side of my current vehicle that I swear are screwing them selves in. Of course I verifyed that the adjuster threads (left or right hand) are correct for the side of the vehicle they are on. I think next time I'm in there I am going to put some marker paint on the star wheel just to see if it does anything at all. Regardless, I set my E-brake every time I stop. My $. 02!
Doug Rees