Hello all,
I had this similar problem around 60 mph. The old cowl shake syndrome. My
only problem was EVERYTHING was new in my front end including new wheels
(TR6 but thoroughly checked) but could not find the problem. Turned out it
was the hub that warped/bent. Pull the wheel (s) and run a straight edge
across the hub along the studs. If you have any rock this will be your
problem. A more accurate check is to put a run out gauge on the following
points on the hub. The edge where the grease cap goes on to seal the
bearings from dirt. Then on the edge of the hub. My original was out over
.070". My used replacement was out about .035". Machined them at work on the
lathe to within +/- .002". Guess what. For the first time in 4 years no
shake what-so-ever. None. Any deviation greater than .010" at this location
on the hub (IMHO), will grow proportionately at the edge of the tire. I have
shared this with several listers and solved long standings problem. Try it
out, you might be surprised. If you do have this problem, try the lathe
first, much cheaper. Just have a machine shop true them up.
Alex Manzo
72 TR6 (with no shimmy)
59 TR3A (as a matter of routine-done) Not on the road yet, but were out over
.025".
----- Original Message -----
From: "Todd Bermudez" <red_tr250@hotmail.com>
To: <jeffn@msystech.com>; <triumphs@autox.team.net>
Sent: Sunday, July 16, 2006 07:48 AM
Subject: RE: [TR] TR6: Play in the Front
> Jeff,
>
> Could be as simple as tightening the wheel bearings. Try that first, but
I
> must ask...how old are your bushings in the front?
>
> My car is off the road for a time as the 30+ year old bushings are almost
> gone on the front end. I was actually getting a clunk when braking, but I
> too have a vibration around 60...bad one too. I suppose you could have
worn
> out bushings on the steering rack mount or worn out tie rod ends, but I
> doubt it's actually the steering rack...possible, but I doubt it. Start
> with the easy things first...bushings, wheel bearings, tie rod ends.
>
> Cheers,
>
> Todd Bermudez
> CD198L
> CF25768UO
>
>
> From: "Jeff Nathanson" <jeffn@msystech.com>
> Reply-To: "Jeff Nathanson" <jeffn@msystech.com>
> To: <triumphs@autox.team.net>
> Subject: [TR] TR6: Play in the Front
> Date: Sat, 15 Jul 2006 23:07:03 -0400
>
> Fellow Triumphants,
>
> I might have a problem with my '72 TR6 and hope to hear your
> opinions.
> Well, it all started when I noticed I had a vibration about 60 MPH.
> So, naturally, I brought it in to have the tires balanced. When the car
was
> on
> the lift, and the tires were not yet taken off, I held the front tire in a
> East-West position and noticed there was some (about 1/2 inch) play. Both
> front tires exhibited the same amount of play. While holding the tire top
> -to
> bottom (North to South), there was no play. Is this natural? Or am I
headed
> for some big buck parts, like the steering rack?
>
>
> Thanking in Advance,
>
> Jeff N.
> '72 TR6
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