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> 2) Everything in the drive line is very smooth up to about 50-55 mph, then
> I get a shaking through the steering wheel. This is like a vibration, but
> the swing of it is much wider. I've been told I have a warped wheel, but
> if that were the case, wouldn't it be apparent at slower speeds? Also, the
> vibration tends to gradually go away as speeds reach 60 and above. Any
> suggestions here?
> Thanks very much in advance
Brian,
A wheel out of balance or bent always seems to show up at about 55 mph. (That
is probably why the US government set the speed limit at 55 a number of years
back.) Seems to go away below 50 and above 60. My guess is that the natural
resonate frequency of the suspension system (spring, mass, etc) is about the
same as the rate of pulses from an out-of-round or out-of-balance tire when the
car is going 55 mph. The resonance probably amplifies the effect.
Nelson Riedel
Granville, OH
76 TR6 (repairing damage from fender bender)
68 TR250 (next project - new paint)
70 TR6 (all the parts in a pile ready to assemble)
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