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FWIW ...
https://www.centricparts.com/media/technical_bulletins_docs/Centric_and_APC_Technical_Whitepaper_B1-Warped-Brake-Disc-8-2018_1.pdf
On 9/27/2025 7:43 AM, john niolon wrote:
> well I carry tools in my suburban (shop content)
> Mt problem is a 2008 suburban that has always had a brake shudder
> (warped rotor) problem since I've had it... every year it seems it's
> replace rotor time.
> This year I know I had two never turned rotors. I put a dial
> indicator on rotors and saw no more than .002 runout.. so I decided to
> just get
> them turned just to see what difference it would make.
> Took them to a reputable shop that turned them and reinstalled. First
> drive was thru the neighborhood with no shudder.
> Second drive was a ten mile trip on freeway... when exiting freeway I
> felt the shudder and it seemed worse than before I turned
> the rotors...
> I'm going to tear them back down next week to check everything but
> wondering if there is something else I need to check or be
> concerned about. I did try stopping with just the parking brake with
> no shudder so that eliminates the rear rotors causing the
> problem. Pads look nearly new and fit in the caliper nicely...
> Caliper pistons are retracting as the should (pads are not bound to
> rotor when
> removing wheels. Lines look ok from the outside. Caliper pins are
> smooth and well lubricated.
> any ideas/suggestions/true life experiences/fantastic tales ???
> john
>
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FWIW ...<br>
<br>
<a class="moz-txt-link-freetext"
href="https://www.centricparts.com/media/technical_bulletins_docs/Centric_and_APC_Technical_Whitepaper_B1-Warped-Brake-Disc-8-2018_1.pdf">https://www.centricparts.com/media/technical_bulletins_docs/Centric_and_APC_Technical_Whitepaper_B1-Warped-Brake-Disc-8-2018_1.pdf</a><br>
<br>
<br>
<div class="moz-cite-prefix">On 9/27/2025 7:43 AM, john niolon
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:1UkSvWeRAH.3PSHGCDX72r@johns-desktop">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<meta name="GENERATOR" content="MSHTML 11.00.10570.1001">
<div><font face="Segoe UI">well I carry tools in my suburban (shop
content)</font></div>
<div>Â </div>
<div><font face="Segoe UI">Mt problem is a 2008 suburban that has
always had a brake shudder (warped rotor) problem since I've
had it... every year it seems it's </font></div>
<div><font face="Segoe UI">replace rotor time.</font></div>
<div>Â </div>
<div><font face="Segoe UI">This year I know I had two never
turned rotors. I put a dial indicator on rotors and saw no
more than .002 runout.. so I decided to just get</font></div>
<div><font face="Segoe UI">them turned just to see what difference
it would make. </font></div>
<div>Â </div>
<div><font face="Segoe UI">Took them to a reputable shop that
turned them and reinstalled. First drive was thru the
neighborhood with no shudder.</font></div>
<div><font face="Segoe UI">Second drive was a ten mile trip on
freeway... when exiting freeway I felt the shudder and it
seemed worse than before I turned</font></div>
<div><font face="Segoe UI">the rotors...</font></div>
<div>Â </div>
<div><font face="Segoe UI">I'm going to tear them back down next
week to check everything but wondering if there is something
else I need to check or be</font></div>
<div><font face="Segoe UI">concerned about. I did try stopping
with just the parking brake with no shudder so that eliminates
the rear rotors causing the</font></div>
<div><font face="Segoe UI">problem. Pads look nearly new and fit
in the caliper nicely... Caliper pistons are retracting as the
should (pads are not bound to rotor when</font></div>
<div><font face="Segoe UI">removing wheels. Lines look ok from the
outside. Caliper pins are smooth and well lubricated.</font></div>
<div>Â </div>
<div><font face="Segoe UI">any ideas/suggestions/true life
experiences/fantastic tales ???</font></div>
<div><font face="Segoe UI">john</font></div>
<br>
</blockquote>
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