Brake Vibration, dont know what to do

So you changed the pads but not the rotors and it didn't work, so you changed the rotors but the pads were already used, the old rotors destroyed them, so you changed the calipers, but still had pads riding on used rotors, good quiz?
Anyway, did you properly torque the rotors into place, or did they warp at heat because they were loose?

 

Have you try switching the tire/wheels front to rear?

 

Have you checked to see if the backing plate could be bent, rubbing against the wheel? It can be bent back if needed.

 

Hi aperry,

It's never too late to go back and follow the service manual step by step, including measuring the rotor runout when you reassemble. They suggest testing at each of the four ways the rotor can go on and you'd be surprised how much difference that can make.

Lucifer, of course, is just testing to see how gullible you are, there is nothing you do to "torque the rotors into place", the wheels hold them on. I sort of wish people wouldn't do stuff like that, it's enough fun to solve real problems when everybody's genuinely out to help.

Maybe you can post again after measuring the runout?

-Chap

 

Just a thought: is it drum brakes in the rear? They tend to be pretty uneventful, but who knows.

 

Have you got a dial gage? And/or micrometer? You can check out the trueness and thickness of the rotors.

This is for 3rd gen, but maybe the tolerances are similar:

 

Wait, so you mean the rapid pulsation, as if the antilock is kicking in?

I wonder what would happen if you force non-ABS braking (pull one of the ABS relays, unplug a wheel speed sensor, anything so the ABS will error out) ... under plain braking do you feel the vibration or not?

-Chap

 

OK if it not mechanical , let try this! be safe! Pick a part of road where you can get to speed with no one around ! Turn off engine! Apply brakes! This would turn off power to the ABS and see problem exist? Roll off side of road and restart, use 4 way flasher ! Can't express being safe! Have a plan before you do this! This way you can rule out the abs system!

 

^ Aleast normally: if ABS is activating there's a light on the dash?

 

Right, new pads on old rotors,ded, but new pads on semi used rotors that haven't worn yet and yer good to go, are the rotors torqued properly?