Brakes still pulsating after replacing rotors, pads, drums and shoes!!

[theizzardking]

Another easier option that people often overlook is removing the rotor and spinning in 180 degrees and putting it back on.

yep that all works as well, but i don't under stand how this works,
spinning it 180, wouldn't that not change a thing if the rotor is true and the hub is not, wouldn't all that do is just put the high/low spot on the hub to a different part of the rotor that's hypothetically set at 0/flat the whole way round?

not arguing just trying to understand this, i prefer not to have my mind made up about anything really, it's easier to learn that way.
thanks!

 

[rsauto]

AC Delco Rotors were the answer for me. I own a shop and machined rotors and drums to no avail, narrowed it down by using my E brake to determine front or rear pulse. Tried a few different drums and then ac delco's. Problem gone completely and did not return.

 

[wshiverick]

Advance parts are garbage to begin with. Also though a good idea to check wheel bearings and control arm bushings. Does it only shake while braking? Does it pull as well or just shake? Whole truck or just the steering wheel? Do you only feel it in the brake pedal? Then it's time to look at the booster and vacuum lines. Any abs or speed sensor codes? Problems in the abs system will cause that too. How many miles and are you in a humid environment? Contaminated brake fluid or restricted brake lines will also do that. Check and see if any pads are wearing faster than the others.

 

[BrianSD_42]

This thread is from 2010.