Re: vibration---GONE ????
Boy, this one sounds like a real puzzle. I'll be interested to see how it sorts out.
I really doubt if it's oil viscosity effect.
The only thing it reminds me of is unbalanced tires sort of getting in and out phase causing a vibration to come and go. I'm surprised it used to happen below 40 mph, but maybe if there are supplimentary front end issues it might be possible.
Steve
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