[DeTomaso] Headlight shake fix
jderyke at aol.com
jderyke at aol.com
Sun Sep 13 00:50:00 EDT 2020
The age-old fix for Pantera headlight shake is to untighten one or two of the three small bolts that hold the drive motor in mesh with the sector gear welded onto the headlight bar. Let the motor-driven gear settle by gravity into full mesh with the big sector gear. Then retighten the bolts. This removes most or all of the excess gear lash that causes most headlight shake.
I have seen Panteras with bent sector gears, possibly from an unrepaired front-end collision. Some will ride nearly off the small motor-driven gear, so be prepared to brute-force the sector gear straight (or straight-er) so this doesn't contribute. Speculating, very stiff suspension springs on stiffly set coil-overs, or maybe just 20 to 30-profile 'rubber-band' front tires on poorly maintained streets might make such shake worse.
-----Original Message-----
From: Scott Mead Photography <scott at scottmeadphotography.com>
To: Julian Kift <julian_kift at hotmail.com>
Cc: detomaso <DeTomaso at server.detomasolist.com>
Sent: Sat, Sep 12, 2020 9:15 pm
Subject: Re: [DeTomaso] Headlight shake fix
Last time I had my car in to Don Byars' place, he replaced the cracked
plastic headlamp gear with a new brass one. I don't know if it's the
gear, or if Don somehow clocked it and the motor, but there's no longer
any flutter in my headlamps (I have the SACC HIDs - POCA June 2018
Newsletter, From Frog to Quad
- [1]https://s3.amazonaws.com/ClubExpressClubFiles/999896/documents/201
8_06_1819920430.pdf?AWSAccessKeyId=AKIA6MYUE6DNNNCCDT4J&Expires=1599970
707&response-content-disposition=inline%3B%20filename%3D2018_06.pdf&Sig
nature=9oOmurTKkgRU%2B2iK07yWvMTx6RY%3D), with the exception of hitting
a sizable pothole. Then everything shakes!
Sent from my iPhone
On Sep 12, 2020, at 5:50 PM, Julian Kift <julian_kift at hotmail.com>
wrote:
On the Amerisport lights I know folks whom have added a bump stop to
the bucket and adjusted so when raised it just creates tension
against
the light and front of the fender. There may be a fix within the mesh
of the gear and drive, but the weight of the light is forward of the
pivot so I like the bump stop method, but not yet executed on my car.
That said, I do believe a lot of the headlight shake I see if from a
stiffly sprung front end and the car bouncing more than the lights
moving independently. BTW I have the ultra low profile Amerisport
60mm
lights, with a very sharp upper light cutoff, which I think adds to
the
perception of the shake from the driving seat.
Julian
__________________________________________________________________
From: DeTomaso <detomaso-bounces at server.detomasolist.com> on behalf
of
Charles Engles <cengles at cox.net>
Sent: Saturday, September 12, 2020 5:40 PM
To: redcatman74 at gmail.com <redcatman74 at gmail.com>; 'detomaso'
<DeTomaso at server.detomasolist.com>
Subject: Re: [DeTomaso] Headlight shake fix
Dear Dick,
I was thinking about this very thing today. I left
after
sunrise and drove through a hundred miles of fog with my headlights
up
and was reminded of the Pantera headlight shake. I could not recall
what the fix is, but I do recall that it does exist. I am keen to
hear
what it is.
Warmest regards, Chuck Engles
-----Original Message-----
From: DeTomaso [[1]mailto:detomaso-bounces at server.detomasolist.com]
On
Behalf Of Dick Koch
Sent: Saturday, September 12, 2020 12:13 PM
To: detomaso
Subject: [DeTomaso] Headlight shake fix
In my latest refresh of my Pantera, I am doing several improvements I
never got to before,, one of which is the headlight shake. I know
this
has been covered before, so if anybody can remember what they did to
fix the problem, I would appreciate telling me what they did to
remedy
it.
Dick Koch - Atlanta
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-------------- next part --------------
The age-old fix for Pantera headlight shake is to untighten one or two
of the three small bolts that hold the drive motor in mesh with the
sector gear welded onto the headlight bar. Let the motor-driven gear
settle by gravity into full mesh with the big sector gear. Then
retighten the bolts. This removes most or all of the excess gear lash
that causes most headlight shake.
I have seen Panteras with bent sector gears, possibly from an
unrepaired front-end collision. Some will ride nearly off the small
motor-driven gear, so be prepared to brute-force the sector gear
straight (or straight-er) so this doesn't contribute. Speculating, very
stiff suspension springs on stiffly set coil-overs, or maybe just 20 to
30-profile 'rubber-band' front tires on poorly maintained streets might
make such shake worse.
-----Original Message-----
From: Scott Mead Photography <scott at scottmeadphotography.com>
To: Julian Kift <julian_kift at hotmail.com>
Cc: detomaso <DeTomaso at server.detomasolist.com>
Sent: Sat, Sep 12, 2020 9:15 pm
Subject: Re: [DeTomaso] Headlight shake fix
Last time I had my car in to Don Byars' place, he replaced the
cracked
plastic headlamp gear with a new brass one. I don't know if it's the
gear, or if Don somehow clocked it and the motor, but there's no
longer
any flutter in my headlamps (I have the SACC HIDs - POCA June 2018
Newsletter, From Frog to Quad
-
[1][1]https://s3.amazonaws.com/ClubExpressClubFiles/999896/documents/20
1
8_06_1819920430.pdf?AWSAccessKeyId=AKIA6MYUE6DNNNCCDT4J&Expires=1599970
707&response-content-disposition=inline%3B%20filename%3D2018_06.pdf&Sig
nature=9oOmurTKkgRU%2B2iK07yWvMTx6RY%3D), with the exception of
hitting
a sizable pothole. Then everything shakes!
Sent from my iPhone
On Sep 12, 2020, at 5:50 PM, Julian Kift
<[2]julian_kift at hotmail.com>
wrote:
On the Amerisport lights I know folks whom have added a bump stop
to
the bucket and adjusted so when raised it just creates tension
against
the light and front of the fender. There may be a fix within the
mesh
of the gear and drive, but the weight of the light is forward of
the
pivot so I like the bump stop method, but not yet executed on my
car.
That said, I do believe a lot of the headlight shake I see if from
a
stiffly sprung front end and the car bouncing more than the lights
moving independently. BTW I have the ultra low profile Amerisport
60mm
lights, with a very sharp upper light cutoff, which I think adds to
the
perception of the shake from the driving seat.
Julian
__________________________________________________________________
From: DeTomaso <[3]detomaso-bounces at server.detomasolist.com> on
behalf
of
Charles Engles <[4]cengles at cox.net>
Sent: Saturday, September 12, 2020 5:40 PM
To: [5]redcatman74 at gmail.com <[6]redcatman74 at gmail.com>; 'detomaso'
<[7]DeTomaso at server.detomasolist.com>
Subject: Re: [DeTomaso] Headlight shake fix
Dear Dick,
I was thinking about this very thing today. I left
after
sunrise and drove through a hundred miles of fog with my headlights
up
and was reminded of the Pantera headlight shake. I could not
recall
what the fix is, but I do recall that it does exist. I am keen to
hear
what it is.
Warmest regards, Chuck Engles
-----Original Message-----
From: DeTomaso
[[1]mailto:[8]detomaso-bounces at server.detomasolist.com]
On
Behalf Of Dick Koch
Sent: Saturday, September 12, 2020 12:13 PM
To: detomaso
Subject: [DeTomaso] Headlight shake fix
In my latest refresh of my Pantera, I am doing several improvements
I
never got to before,, one of which is the headlight shake. I know
this
has been covered before, so if anybody can remember what they did
to
fix the problem, I would appreciate telling me what they did to
remedy
it.
Dick Koch - Atlanta
_______________________________________________
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[15]https://s3.amazonaws.com/ClubExpressClubFiles/999896/documents/2018
_06_1819920430.pdf?AWSAccessKeyId=AKIA6MYUE6DNNNCCDT4J&Expires=15999707
07&response-content-disposition=inline%3B%20filename%3D2018_06.pdf&Sign
ature=9oOmurTKkgRU%2B2iK07yWvMTx6RY%3D
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