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vibration/shudder at 70 - possible alternatives (other than wheel balance?)
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well that is a possibility and could be common to all 16 year old cars...
I am about to swap trannies in my car for a completely rebuilt with botl kit
and 80% LSD in it, Ill let you know.
ATS - Patrick Bureau - txrocco@sbcglobal.net
-----Original Message-----
From: scirocco-l-admin@scirocco.org
[mailto:scirocco-l-admin@scirocco.org]On Behalf Of Robbie Cotner
Sent: Thursday, April 24, 2003 1:31 AM
To: Allyn
Cc: scirocco-l@scirocco.org
Subject: Re: vibration/shudder at 70 - possible alternatives (other than
wheel balance?)
Big shot in the dark here, but perhaps this vibration has something to do
with the differential? Specifically I'm thinking the differential bearings,
mine are going bad and thus my driveflanges have some play in them.
-Rob
Allyn <amalventano@sc.rr.com> wrote:
i agree with this theory, but i just shot it out of the water
tonight --- i put in a fresh set of rebuilt half shafts. while it did help
the issue slightly, the shudder at 70 is still there. over the past week of
narrowing the problem down, i have these facts remaining:
- vibration seems to be coming from front right.
- front right is the wheel is the one i had sent off to the straightener
(it came back *very* close to perfectally true.
- jacked up front right and spun it (via engine). the wheel seems to be
straight as it spins, but the tire seems like it may be slightly out of
round. i'll have to check this out some more later.
Al
----- Original Message -----
From: L F
To: Michael Abatzis ; scirocco-l@scirocco.org
Sent: Wednesday, April 23, 2003 7:33 PM
Subject: Re: vibration/shudder at 70 - possible alternatives (other
than wheel balance?)
I gotta' chime in here fellas; I've been driving cars for a lot of
years and learned that a harmonic vibration most likely is NOT a wheel
imbalance.
I'd lean towards CV joint or engine imbalance (I've had both of these
situations result in harmonics)
Larry
sandiego16v
----- Original Message -----
From: Michael Abatzis
To: scirocco-l@scirocco.org
Sent: Tuesday, April 22, 2003 8:41 AM
Subject: RE: vibration/shudder at 70 - possible alternatives (other
than wheel balance?)
try getting a mounted balance--the wheels are balanced on the car,
so it
essentially balances all that rotating mass (rotors, hubs, etc). my
shop
does it for $8 wheel. i had the wheels/tires balanced unmounted
first, then
mounted; i was amazed how much tweaking needed to be done with the
mounted
balance. the car is lowered, and is rock solid as fast as i care to
go...
-Michael Abatzis
Hotlanta! GA-->Soon to be New Orleans!
1988 Scirocco 2L 16v RIP-->parting, finally taking orders:
www.learnlink.emory.edu/~mabatzi/mikes_page1.html
1987 Scirocco 2L 16v...
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<DIV><SPAN class=3D743253812-24042003><FONT face=3DArial color=3D#0000ff =
size=3D2>well=20
that is a possibility and could be common to all 16 year old=20
cars...</FONT></SPAN></DIV>
<DIV><SPAN class=3D743253812-24042003><FONT face=3DArial color=3D#0000ff =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D743253812-24042003><FONT face=3DArial color=3D#0000ff =
size=3D2>I am=20
about to swap trannies in my car for a completely rebuilt with botl kit =
and 80%=20
LSD in it, Ill let you know.</FONT></SPAN></DIV>
<DIV> </DIV>
<P><FONT size=3D2>ATS - Patrick Bureau - =
txrocco@sbcglobal.net<BR></FONT></P>
<BLOCKQUOTE=20
style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px =
solid">
<DIV class=3DOutlookMessageHeader dir=3Dltr align=3Dleft><FONT =
face=3DTahoma=20
size=3D2>-----Original Message-----<BR><B>From:</B>=20
scirocco-l-admin@scirocco.org =
[mailto:scirocco-l-admin@scirocco.org]<B>On=20
Behalf Of </B>Robbie Cotner<BR><B>Sent:</B> Thursday, April 24, 2003 =
1:31=20
AM<BR><B>To:</B> Allyn<BR><B>Cc:</B>=20
scirocco-l@scirocco.org<BR><B>Subject:</B> Re: vibration/shudder at 70 =
-=20
possible alternatives (other than wheel balance?)<BR><BR></FONT></DIV>
<DIV>Big shot in the dark here, but perhaps this vibration has =
something to do=20
with the differential? Specifically I'm thinking the =
differential=20
bearings, mine are going bad and thus my driveflanges have some play =
in=20
them. </DIV>
<DIV> </DIV>
<DIV>-Rob<BR><BR><B><I>Allyn <amalventano@sc.rr.com></I></B>=20
wrote:</DIV>
<BLOCKQUOTE=20
style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px =
solid">
<META content=3D"MSHTML 6.00.2800.1141" name=3DGENERATOR>
<STYLE></STYLE>
<DIV><FONT face=3DArial size=3D2>i agree with this theory, but i =
just shot it=20
out of the water tonight --- i put in a fresh set of rebuilt half =
shafts.=20
while it did help the issue slightly, the shudder at 70 is still =
there. over=20
the past week of narrowing the problem down, i have these facts=20
remaining:</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>- vibration seems to be coming from =
front=20
right.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>- front right is the wheel is the =
one i had=20
sent off to the straightener (it came back *very* close to =
perfectally=20
true.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>- jacked up front right and spun it =
(via=20
engine). the wheel seems to be straight as it spins, but the tire =
seems like=20
it may be slightly out of round. i'll have to check this out some =
more=20
later.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Al</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- =
</DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Drocco16v@netzero.net =
href=3D"mailto:rocco16v@netzero.net";>L F</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dabatzis2@hotmail.com=20
href=3D"mailto:abatzis2@hotmail.com";>Michael Abatzis</A> ; <A=20
title=3Dscirocco-l@scirocco.org=20
=
href=3D"mailto:scirocco-l@scirocco.org";>scirocco-l@scirocco.org</A> =
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Wednesday, April 23, =
2003 7:33=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: =
vibration/shudder at 70=20
- possible alternatives (other than wheel balance?)</DIV>
<DIV><BR></DIV>
<DIV><FONT face=3DArial size=3D2>I gotta' chime in here =
fellas; I've=20
been driving cars for a lot of years and learned that a=20
<EM>harmonic</EM> <EM>vibration </EM>most likely is NOT a =
wheel=20
imbalance. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2> I'd lean towards CV joint =
or engine=20
imbalance (I've had both of these situations result in=20
harmonics)</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>Larry</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>sandiego16v</FONT></DIV>
<BLOCKQUOTE=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- =
</DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Dabatzis2@hotmail.com =
href=3D"mailto:abatzis2@hotmail.com";>Michael=20
Abatzis</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A=20
title=3Dscirocco-l@scirocco.org=20
=
href=3D"mailto:scirocco-l@scirocco.org";>scirocco-l@scirocco.org</A> =
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Tuesday, April 22, =
2003 8:41=20
AM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> RE: =
vibration/shudder at=20
70 - possible alternatives (other than wheel balance?)</DIV>
<DIV><BR></DIV>try getting a mounted balance--the wheels are =
balanced on=20
the car, so it <BR>essentially balances all that rotating mass =
(rotors,=20
hubs, etc). my shop <BR>does it for $8 wheel. i had the =
wheels/tires=20
balanced unmounted first, then <BR>mounted; i was amazed how =
much=20
tweaking needed to be done with the mounted <BR>balance. =
the car=20
is lowered, and is rock solid as fast as i care to=20
go...<BR><BR><BR>-Michael Abatzis<BR>Hotlanta! GA-->Soon to =
be New=20
Orleans!<BR>1988 Scirocco 2L 16v RIP-->parting, finally =
taking=20
orders: <BR><A=20
=
href=3D"http://www.learnlink.emory.edu/~mabatzi/mikes_page1.html";>www.lea=
rnlink.emory.edu/~mabatzi/mikes_page1.html</A><BR>1987=20
Scirocco 2L=20
=
16v...<BR><BR><BR><BR><BR>_______________________________________________=
__________________<BR>MSN=20
8 helps eliminate e-mail viruses. Get 2 months FREE*. =
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href=3D"mailto:Scirocco-l@scirocco.org";>Scirocco-l@scirocco.org</A><BR><A=
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