[6pack] Trying to locate the source of a TR6 vibration

[jim hearn]

I have had this not too severe of a vibration for some time.  It kind of has
me stumped as to what it might be.  The TR6 is a 1974 with a standard 4
speed tranny.  The vibration only occurs when accelerating in fourth gear.
In any other gear, it is not there.  Release the throttle in fourth gear and
the vibration goes away.  To increase acceleration on the flat and level,
will increase the vibration, but to increase the throttle input to climb a
hill does not increase the vibration.  The vibration can be felt through the
accelerator pedal and the steering column, but, as I said, it is not severe
but it is constant under the conditions noted.  Any thoughts would be
greatly appreciated.  Jim

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