[TR] Vibration at Speed

[Dave]

Wow, that's interesting!  True the hub. 
I was going to mention that the wheels be checked.  A bent wheel can be balanced, but that doesn't mean you won't feel it at speed. 
The 65 to 70 mph points to a tire or wheel problem in my experience.
I have 16 plus TR3 wheels and every one is bent beyond use, but they all came off cars that were being driven.  All of those wheels have been reconstituted as hose hangers around my property.  They make terrific hose hangers and old wire wheels actually look very elegant in the garden.

Dave H.

Sent from my iPad

> On Nov 1, 2015, at 4:00 PM, Italyfound <italyfound at gmail.com> wrote:
> 
> Been a while since I posted but this caught my eye.
> 
> I had the same problem with my 72 TR6. Took a while to solve the problem but I would bet money this is your problem too.
> 
> My problem was with the face of the hubs. Mine turned out not to be flat but had a noticeable runout. You can check yours by removing the tire and wheel and with a run out guage check the surface front to back and top to bottom. If you a that there is an issue have them surface ground at a machine shop. Simple process. Solved my problem immediately....
> 
> What occurs when they are bad is when you tighten down the lug nuts the wheel is actually distorted to match the face of the hub.
> 
> Alex Manzo
> 72 TR6
> 59 TR3A
> 
> 
> 
> ----- Original Message ----- From: <thenicholls at verizon.net>
> To: <r_rochlin at hotmail.com>; <triumphs at autox.team.net>
> Sent: Tuesday, November 03, 2015 12:26 AM
> Subject: Re: [TR] Vibration at Speed
> 
> 
>> Bob, I have a 72 TR6 myself, the whole front end has been rebuilt, and the tires are all in balance.
>> 
>> 
>> I have a vibration between 60 and 65, I just step on the gas and go a little faster until it stops.
>> 
>> 
>> It has always been that way so I am kind of used to it.
>> 
>> 
>> Good luck with yours.
>> 
>> 
>> Craig
>> 72 TR6 Vienna, VA
>> 
>> 
>> On 11/02/15, Bob Rochlin<r_rochlin at hotmail.com> wrote:
>> 
>> Hi Everyone,
>> Over the summer I got a new set of Michelins for my TR6. The old tires were 15 years old and were causing some shimmy vibration as well as being well past safe. This was in connection with getting my wire wheels straightened and trued. The wires guy, New England Wire Wheel, mounted and balanced the tires with a Snap-on static balancer . When I got the wheels back on the car I went out for a ride and felt a definite vibration between 65 and 75 MPH. I concluded that the wheels needed to be rebalanced with a dynamic balancer. I found a shop who could balance the tires correctly and had them rebalanced. The tires were little better, but there was still a pronounced vibration in the seat and body at 65 to 75 MPH. I brought the tires back to the tire shop and they graciously first checked the tire balance and then rebalanced them. They said that the balance was of about a 1/4 oz. , and that two of the tires seemed to be a very slightly out of round. I mount those tire on the rear, but aga
>> in the same problem.
>> I've moved the tires from front to back thinking if the offending tires were on the front wheels the vibration would be through the steering wheel and not the frame. No joy. My thought is that there is something in the driveline causing the vibration, perhaps the rear brake drums worn out of balance. The drive shaft was balanced 5 to 6 years back. Over the years i've replaced all the universal joints. As far as I can tell the rear drums are original to the car, as are the half shafts.
>> Before I start pulling the driveline apart I thought I see If anyone has had a similar problem of a suggestion of where to go next. I'd appreciate the input.
>> Bob
>> 72'TR6
> 
> 
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