Tom,
Thanks for the timely reply. Your two cents are now up to three with all
the interest accrued since December!!
Bud
----- Original Message -----
From: "Tom Di Iulio" <diiulio@ix.netcom.com>
To: "Triumphs Mailing List" <triumphs@autox.team.net>; "Robert M. Sexton"
<sexton@starmark.net>
Sent: Friday, December 08, 2000 7:50 PM
Subject: Re: TR6 Occasional Pulsation/Vibration Under Braking
>
> sounds like your front disc rotors need to be turned. i had this same
issue on an
> american car and the problem was warped rotors. if there's no vibration
without braking, i
> believe the issue is somewhere in the brake components. and if it's not
the rotors, i'd
> look at the calipers and how they interact with the rotor.
> my 2 cents....
> Tom Di Iulio
> 1976 TR6
> Denver, CO
>
> ----- Original Message -----
> From: "Robert M. Sexton" <sexton@starmark.net>
> To: "Triumph Mailing List" <triumphs@autox.team.net>
> Sent: Friday, December 08, 2000 5:19 PM
> Subject: TR6 Occasional Pulsation/Vibration Under Braking
>
>
> >
> > My 1976 Triumph TR6 has 33,700 miles (original) on it and I have just
had
> > some mechanical work done on the brakes, bushings, and stiffer springs
> > (from TRF) including new brake rotors, stainless steel brake jumpers,
new
> > discs, new rear brake shoes, aluminum steering guide (from TRF), and
> > electronic ignition. Also, the rear differential mounting was
reinforced
> > and cracks welded.
> >
> > I don't know whether everything is now stiffer in the suspension or
what,
> > but now there is a stronger pulsation of the brake pedal and shaking
when
> > normally (lightly) putting on the brakes --- sometimes. However, when
> > braking hard, the brakes work fine without any shaking of roughness of
the
> > car. While driving under throttle, lightly touching the brake pedal
> > generates a pulsation. Before the repairs to the brakes and suspension,
> > only occasional shaking was noticed. The car drives and rides normally
up
> > to 70mph or so (highest that I tested it today) so the general balance
of
> > the wheels, tires, and suspension appear to be OK.
> >
> > The timing for this is not good since I wanted to take the TR6 for a few
> > laps around VIR (http://www.virclub.com) tomorrow (Saturday, 09dec2000).
> >
> > The mechanic (very good sports car and formula racer mechanic) thought
that
> > machining the rear brake drums might help --- it did not.
> >
> > Our possible thoughts are as follows:
> >
> > 1. The front brass trunnions have slight play. Could this be the
source
> > of the vibration when the car weight is distributed in certain
situations
> > under light braking???
> >
> > 2. Something in the suspension or brakes???
> >
> > 3. Hydraulic brake cylinders and/or servo unit may be generating
transients???
> >
> > Does anyone have any ideas, suggestions, or experience in this
situation????
> >
> > Thanks for your help.
> >
> > Bob Sexton
> > sexton@starmark.net
> > 804.792.0167
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