My driver's side self adjusters have never worked right since I've owned my truck and believe me I've taken it apart several times cleaning,lubing and checking it out with no success.
I just manually adjust at each oil change, pass side will usually take 1-2 clicks the driver's 10-15.
Way I do it is jack both rears up and turn the star wheel upwards while spinning the tire till it just starts to drag. That's it. No need to back off the star wheel, first time you apply the brakes the slight drag will stop.