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and also check the phasing of the U-joints, ie crosses lined-up...
Glen
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-----Original Message-----
From: toodamnfunky <toodamnfunky@comcast.net>
To: Charlton, Duncan <duncan.charlton54@gmail.com>
Cc: fot <fot@autox.team.net>
Sent: Mon, Jun 15, 2015 3:38 pm
Subject: Re: [Fot] TR4 High speed driveline vibration
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Thanks Duncan but I never get the vibration under high loads like coming of=
f a corner, it's only at top speed. =20
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However the trans mount is worth looking in to. I'll have the driveshaft ou=
t to a shop by next Monday to check the balance and install new u-joints =
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just in case. I hope the problem is that or the trans mount. =20
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jim =20
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From: "Duncan Charlton" <duncan.charlton54@gmail.com> =20
To: toodamnfunky@comcast.net =20
Cc: "fot" <fot@autox.team.net> =20
Sent: Monday, June 15, 2015 1:13:33 PM =20
Subject: Re: [Fot] TR4 High speed driveline vibration =20
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Jim, =20
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How are your motor and trans mounts? If they allow the engine/gearbox comb=
o to shift out of line when under high torque, the u-joints could move out =
of proper alignment, but then when power is reduced, things would shift bac=
k into position. If you put the car on jackstands and run it to this rpm i=
n top gear (might not be a bad idea to remove the drive wheels and tires if=
you=E2=80=99re sure they=E2=80=99re balanced) there won=E2=80=99t be much =
load on the engine, so if the vibration is due to deformation of the mounts=
, the vibration should not appear. =20
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Duncan =20
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On Jun 15, 2015, at 10:55 AM, toodamnfunky@comcast.net wrote: =
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FoT, =20
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I have a driveline vibration that doesn't start up until I get to about 95-=
100 MPH. I figured I would start with the driveshaft =20
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before looking into the diff or OD/trans. I have an IRS car with Richard Go=
od CV axles and hubs so it's very un likely its that but =20
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I will inspect them. I'm wondering if anybody has any advice on high speed =
vibration diagnosis or detection. =20
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What I'm wondering is even if it is the driveshaft how would I know with it=
sitting on my bench. =20
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Any help would, as always be greatly appreciated. =20
=20
Jim g =20
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_______________________________________________ =20
fot@autox.team.net =20
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http://www.fot-racing.com =20
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Archive: http://www.team.net/archive =20
on54@gmail.com =20
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_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Donate:
Archive: http://www.team.net/archive
Forums:
http://www.team.net/forums
http://autox.team.net/mailman/options/fot/fubog1@aol.com
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<font color=3D'black' size=3D'2' face=3D'Arial, Helvetica, sans-serif'>an<f=
ont size=3D"2">d also check the phasing of the U-joints, ie crosses lined-u=
p...<br>
Glen<br>
</font>
<div> <br>
</div>
<div> <br>
</div>
<div> <br>
</div>
<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black">-----=
Original Message-----<br>
From: toodamnfunky <toodamnfunky@comcast.net><br>
To: Charlton, Duncan <duncan.charlton54@gmail.com><br>
Cc: fot <fot@autox.team.net><br>
Sent: Mon, Jun 15, 2015 3:38 pm<br>
Subject: Re: [Fot] TR4 High speed driveline vibration<br>
<br>
<div id=3D"AOLMsgPart_1.2_91ec4250-83d2-4511-b514-a21b6a2b9950">
<div class=3D"aolReplacedBody">
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<div style=3D"font-family: Arial; font-size: 12pt; color: #000000">
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<div>
Thanks Duncan but I never get the vibration under high loads like coming of=
f a corner, it's only at top speed.
<br>
</div>
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=20
<div>
However the trans mount is worth looking in to. I'll have the driveshaft ou=
t to a shop by next Monday to check the balance and install new u-joints
</div>
=20
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<div>
just in case. I hope the problem is that or the trans mount.
</div>
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<div>
</div>
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<div>
jim
</div>
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<div>
<br>
</div>
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<hr id=3D"zwchr">=20
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<div style=3D"FONT-SIZE: 12pt; TEXT-DECORATION: none; FONT-FAMILY: Helvetic=
a,Arial,sans-serif; FONT-WEIGHT: normal; COLOR: #000; FONT-STYLE: normal">
<b>From: </b>"Duncan Charlton" <<a removedlink__5a868fce-00fe-4585-ad=
02-eebaad3cd522__href=3D"mailto:duncan.charlton54@gmail.com";>duncan.charlto=
n54@gmail.com</a>>
<br>
<b>To: </b><a removedlink__5a868fce-00fe-4585-ad02-eebaad3cd522__href=3D=
"mailto:toodamnfunky@comcast.net";>toodamnfunky@comcast.net</a>
<br>
<b>Cc: </b>"fot" <<a removedlink__5a868fce-00fe-4585-ad02-eebaad3cd52=
2__href=3D"mailto:fot@autox.team.net";>fot@autox.team.net</a>>
<br>
<b>Sent: </b>Monday, June 15, 2015 1:13:33 PM
<br>
<b>Subject: </b>Re: [Fot] TR4 High speed driveline vibration
<br>
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<div>
<br>
</div>
Jim,=20
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<div>
<br>
</div>
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<div>
How are your motor and trans mounts? If they allow the engine/gearbox=
combo to shift out of line when under high torque, the u-joints could move=
out of proper alignment, but then when power is reduced, things would shif=
t back into position. If you put the car on jackstands and run it to =
this rpm in top gear (might not be a bad idea to remove the drive wheels an=
d tires if you=E2=80=99re sure they=E2=80=99re balanced) there won=E2=80=99=
t be much load on the engine, so if the vibration is due to deformation of =
the mounts, the vibration should not appear.
</div>
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<div>=20
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<div>=20
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<div>
<br>
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<div>=20
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<div>
Duncan
</div>
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<br>
</div>
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<div>
<br>
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<div>=20
<blockquote>=20
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<div>
On Jun 15, 2015, at 10:55 AM,=20
<a target=3D"_blank" removedlink__5a868fce-00fe-4585-ad02-eebaad=
3cd522__href=3D"mailto:toodamnfunky@comcast.net";>toodamnfunky@comcast.net</=
a> wrote:
</div>
<br class=3D"Apple-interchange-newline">=20
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<div>=20
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<div>=20
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<div style=3D"FONT-SIZE: 12pt; FONT-FAMILY: Arial">=20
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<div>
FoT,
<br>
</div>
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<div>
I have a driveline vibration that doesn't start up until I get to about 95-=
100 MPH. I figured I would start with the driveshaft
</div>
=20
=20
<div>
before looking into the diff or OD/trans. I have an IRS car with Richard Go=
od CV axles and hubs so it's very un likely its that but
</div>
=20
=20
<div>
I will inspect them. I'm wondering if anybody has any advice on high speed =
vibration diagnosis or detection.
</div>
=20
=20
<div>
What I'm wondering is even if it is the driveshaft how would I know with it=
sitting on my bench.=20
</div>
=20
=20
<div>
Any help would, as always be greatly appreciated.
</div>
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<div>
Jim g
</div>
</div>
</div>
_______________________________________________
<br>
<a target=3D"_blank" removedlink__5a868fce-00fe-4585-ad02-eebaad=
3cd522__href=3D"mailto:fot@autox.team.net";>fot@autox.team.net</a>
<br>
<br>
<a removedlink__5a868fce-00fe-4585-ad02-eebaad3cd522__href=3D"http://www.fo=
t-racing.com" target=3D"_blank">http://www.fot-racing.com</a>
<br>
<br>
//www.team.net/donate.html" target=3D"_blank">http://www.team.net/donate.ht=
ml</a>
<br>
Archive: <a removedlink__5a868fce-00fe-4585-ad02-eebaad3cd522__href=3D"http=
://www.team.net/archive" target=3D"_blank">http://www.team.net/archive</a>
<br>
Forums: <a removedlink__5a868fce-00fe-4585-ad02-eebaad3cd522__href=3D"http:=
//www.team.net/forums" target=3D"_blank">http://www.team.net/forums</a>
<br>
ref=3D"http://autox.team.net/mailman/options/fot/duncan.charlton54@gmail.co=
m" target=3D"_blank">http://autox.team.net/mailman/options/fot/duncan.charl=
ton54@gmail.com</a>
<br>
<br>
<br>
</div>
</blockquote>
</div>
<br>
</div>
</div>
</div>
</div>
</div>
</div>
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<div>
<br>
</div>
</div>
</div>
</div>
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in: 0px;font-family: Tahoma, Verdana, Arial, Sans-Serif;font-size: 12px;col=
or: #000;background-color: #fff;">
<pre style=3D"font-size: 9pt;"><tt>________________________________________=
_______
<a removedlink__5a868fce-00fe-4585-ad02-eebaad3cd522__href=3D"mailto:fot@au=
tox.team.net">fot@autox.team.net</a>
<a removedlink__5a868fce-00fe-4585-ad02-eebaad3cd522__href=3D"http://www.fo=
t-racing.com" target=3D"_blank">http://www.fot-racing.com</a>
Donate:
<a removedlink__5a868fce-00fe-4585-ad02-eebaad3cd522__href=3D"http://www.te=
am.net/donate.html" target=3D"_blank">http://www.team.net/donate.html</a>
Archive: <a removedlink__5a868fce-00fe-4585-ad02-eebaad3cd522__href=3D"http=
://www.team.net/archive" target=3D"_blank">http://www.team.net/archive</a>
Forums:
<a removedlink__5a868fce-00fe-4585-ad02-eebaad3cd522__href=3D"http://www.te=
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<a removedlink__5a868fce-00fe-4585-ad02-eebaad3cd522__href=3D"http://autox.=
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_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://www.team.net/archive
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