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[Shop-talk] brake shudder

To: "shop-talk" <shop-talk@autox.team.net>
Subject: [Shop-talk] brake shudder
From: "john niolon" <jniolon@att.net>
Date: Sat, 27 Sep 2025 09:43:44 -0500
Delivered-to: mharc@autox.team.net
Delivered-to: shop-talk@autox.team.net
References: <1UkSvWeRAH.3PSHGCDX72r.ref@johns-desktop> mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.yahoo
User-agent: OEClassic/5.2 (Win10.19045; P; 2025-08-14)
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well I carry tools in my suburban (shop content)
=20
Mt problem is a 2008 suburban that has always had a brake shudder (warped=
=20
rotor) problem since I've had it... every year it seems it's=20
replace rotor time.
=20
This year I know I had two  never turned rotors.  I put a dial indicator on=
=20
rotors and saw no more than .002 runout.. so I decided to just get
them turned just to see what difference it would make. =20
=20
Took them to a reputable shop that turned them and reinstalled.  First driv=
e=20
was thru the neighborhood with no shudder.
Second drive was a ten mile trip on freeway... when exiting freeway I felt =
the=20
shudder and it seemed worse than before I turned
the rotors...
=20
I'm going to tear them back down next week to check everything but wonderin=
g if there is something else I need to check or be
concerned about.  I did try stopping with just the parking brake with no sh=
udder so that eliminates the rear rotors causing the
problem.  Pads look nearly new and fit in the caliper nicely... Caliper pis=
tons are retracting as the should (pads are not bound to rotor when
removing wheels. Lines look ok from the outside. Caliper pins are smooth an=
d well lubricated.
=20
any ideas/suggestions/true life experiences/fantastic tales ???
john
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<HTML><HEAD>
<META name=3DGENERATOR content=3D"MSHTML 11.00.10570.1001"></HEAD>
<BODY>
<DIV><FONT face=3D"Segoe UI">well I carry tools in my suburban (shop conten=
t)</FONT></DIV>
<DIV><FONT face=3D"Segoe UI"></FONT>&nbsp;</DIV>
<DIV><FONT face=3D"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=3D"Segoe UI">replace rotor time.</FONT></DIV>
<DIV><FONT face=3D"Segoe UI"></FONT>&nbsp;</DIV>
<DIV><FONT face=3D"Segoe UI">This year I know I had two&nbsp; never turned =
rotors.&nbsp; I put a dial indicator on rotors and saw no more than .002 ru=
nout.. so I decided to just&nbsp;get</FONT></DIV>
<DIV><FONT face=3D"Segoe UI">them turned just to see what difference it wou=
ld make.&nbsp; </FONT></DIV>
<DIV><FONT face=3D"Segoe UI"></FONT>&nbsp;</DIV>
<DIV><FONT face=3D"Segoe UI">Took them to a reputable shop that turned them=
 and reinstalled.&nbsp; First drive was thru the neighborhood with no shudd=
er.</FONT></DIV>
<DIV><FONT face=3D"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=3D"Segoe UI">the rotors...</FONT></DIV>
<DIV><FONT face=3D"Segoe UI"></FONT>&nbsp;</DIV>
<DIV><FONT face=3D"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 o=
r be</FONT></DIV>
<DIV><FONT face=3D"Segoe UI">concerned about.&nbsp; 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=3D"Segoe UI">problem.&nbsp; Pads look nearly new and fit in=
 the caliper nicely... Caliper pistons are retracting as the should (pads a=
re not bound to rotor when</FONT></DIV>
<DIV><FONT face=3D"Segoe UI">removing wheels. Lines look ok from the outsid=
e. Caliper pins are smooth and well lubricated.</FONT></DIV>
<DIV><FONT face=3D"Segoe UI"></FONT>&nbsp;</DIV>
<DIV><FONT face=3D"Segoe UI">any ideas/suggestions/true life experiences/fa=
ntastic tales ???</FONT></DIV>
<DIV><FONT face=3D"Segoe UI">john</FONT></DIV></BODY></HTML>
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