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Hi Everyone=2C 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=2C New England Wire Wheel=2C =
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 vibrat=
ion between 65 and 75 MPH. I concluded that the wheels needed to be rebala=
nced with a dynamic balancer. I found a shop who could balance the tires c=
orrectly and had them rebalanced. The tires were little better=2C but ther=
e 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. =2C and that two of the tires seemed to be a very slight=
ly out of round. I mount those tire on the rear=2C but again the same prob=
lem. 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 i=
n the driveline causing the vibration=2C 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 rea=
r drums are original to the car=2C as are the half shafts. Before I st=
art 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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<body class=3D'hmmessage'><div dir=3D'ltr'>Hi Everyone=2C<div> =3B &nbs=
p=3B  =3BOver the summer I got a new set of Michelins for my TR6. The o=
ld tires were 15 years old and were causing some shimmy vibration as well a=
s being well past safe.  =3BThis was in connection with getting my wire=
wheels straightened and trued.  =3BThe wires guy=2C New England Wire W=
heel=2C mounted and balanced the tires with a Snap-on static balancer . Whe=
n I got the wheels back on the car I went out for a ride and felt a definit=
e vibration between 65 and 75 MPH.  =3BI concluded that the wheels need=
ed to be rebalanced with a dynamic balancer.  =3BI found a shop who cou=
ld balance the tires correctly and had them rebalanced.  =3BThe tires w=
ere little better=2C but there was still a pronounced vibration in the seat=
and body at 65 to 75 MPH.  =3BI brought the tires back to the tire sho=
p and they graciously first checked the tire balance and then rebalanced th=
em.  =3BThey said that the balance was of about a 1/4 oz. =2C and that =
two of the tires seemed to be a very slightly out of round.  =3BI mount=
those tire on the rear=2C but again the same problem.  =3B</div><div>&=
nbsp=3B  =3B I've moved the tires from front to back thinking if the of=
fending tires were on the front wheels the vibration would be through the s=
teering wheel and not the frame.  =3BNo joy.  =3BMy thought is that=
there is something in the driveline causing the vibration=2C perhaps the r=
ear brake drums worn out of balance.  =3BThe drive shaft was balanced 5=
to 6 years back.  =3BOver the years i've replaced all the universal jo=
ints.  =3BAs far as I can tell the rear drums are original to the car=
=2C as are the half shafts.  =3B</div><div> =3B  =3B Before I s=
tart pulling the driveline apart I thought I see If anyone has had a simila=
r problem of a suggestion of where to go next.  =3BI'd appreciate the i=
nput.</div><div> =3B  =3B Bob</div><div> =3B  =3B 72'TR6</d=
iv> </div></body>
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