Balance and alignment alright? Beyond that, maybe you got mud in yer tires.

 

Have you been using the same brand of rotors? If so, you might try a different brand.

 

You mention replacing rotors which is my first suspicion with braking vibration. What about the rear? Drums I assume. Check condition. Also may have some caliper issue with causing some vibration or causing damage to rotors and warpage. Any pulling to one side or the other under braking as well?

Sent from my Samsung Galaxy S8+ using Tapatalk

 

So its fine every time you replace the rotors? Then it pulses? Or pulses right away?
I have gotten rotors a few times that needed to be "turned" right out of the box- not uncommon, but repeatedly like you case, no.
High-speed glazing will build up and causing pulsing.

What I would do- take the rotors you have now, take them to a shop and have them "turned". They will put them on a lathe and get them perfectly flat. They'll let you know what came off. Should be $20-30 to do it.

Now put them back on, make sure you'e using brake grease SPARINGLY under the caliper boots and only a little bit on the contacting edges of the pads. Make sure there is no absolutely nothing on the rotors, spray liberally with brake cleaner and wear latex gloves. In face fact spray everything down before the pads and rotor go back in.

Final step- "bed" the brakes. This is a process of getting the rotors increasing warmed up slowly, then slam on them hard. I swear by it for long-lasting brakes.
[url=http://brakeperformance.com/b...nce.com/bedding-in-rotors.php]http://brakeperformance.com/bedding-in-rotors.php

 

Are you sure you don't have a sticking caliper or bad front brake hose causing the rotors to overheat and "warp".

 

Is the vibration in the steering or the seat of your pants.. this will tell you front or back, should be able to figure out what is what. I would suspect u have something sticking and warping your rotor

Sent from my SM-G903W using Tapatalk

 

thanks for all the replies. it's definitely coming from the front end. this problem started before I did the first brake job. I bought the rotors and ceramic pads from advance but it came back rite away.The pads they sell looked like metallic and I thought it might be the pads. SO I got my original gm rotors had them turned and installed new pads and it came back again so I got new rotors and car quest top of the line ceramic pads and installed them same thing.believe me I cleaned the heck out of everything when I put it together each time. I'm going to take it apart one more time and check everything. thanks again for all the replies I'll let you know if I find anything.

 

Check your steering system also, especially pinion-rack bolts to frame.

 

When you change the brake pads and rotors, does it go away for a while and then come back soon? If so, I would agree that a caliper is sticking and overheating the rotor and causing it to warp.

 

I just finished going through everything again the slide pins were all Grease and moving just fine. the calipers were moving freely and do not seem to be sticking on either side. the only thing I found was I did a reading on both front abs sensors. the driver's side red between 350 and 400 megavolts while the one on the passenger side was all over the place. if I have a bad sensor would it make the brakes pulsate like that.

 

I faulty sensor could, but giving false reading of different wheel speeds...but I would think you would be able to tell if the abs was activating vs vibrations.

 

U never answered the question... you could be totally changing the wrong end or problem

Sent from my SM-G903W using Tapatalk

 

Mine does the same thing. Only really notice it when coming off the hwy and really applying the brakes hard. You can feel it and hear it.

I replaced the front rotors and it came back.
Both front calipers are fine.
Pads are clean and wearing evenly on both sides of the rotor and Left to Right.
Truck runs smooth as silk on the hwy, no vibration, had 4-wheel alignment checked and it's within spec.

It's easy to tell if it's the front and not rears cause the rears catch first when you just touch the pedal...and as you really push hard the worse it gets in the front.

I'm thinking it's one of the lower ball joints or a CV that gets torqued hard during those aggressive stops. Otherwise, I'm out of ideas.

 

I went ahead and tried a new speed sensor on the passenger side and it did not help. I think the sensor may have been defective because the computer could not read it. so the driver side would grab at low speed while the right side wouldn't at all. so I removed it and put back the original and it stops as it did before. I guess I'm going to have to take it to a dealer and have it checked out unless anybody has any further ideas thanks to everyone.

 

jack up the front and move the wheels around. Up and down and side to side. Check for any play or movement. It could be several things from loose tie rods, ball joints or even bearings starting to go bad. You could go to an alignment shop and have them check it out. It sounds like you got the brakes covered.