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odd vibration

fast400

Pressurized
Finally got to drive the TTA the last couple of days after this years long German Winter.
I'm noticing a couple of odd vibrations.
1. It seems when I'm accelerating normally, in 3rd I get a rhythmical noise...here's the only way I know to describe whirrrr, normal, whirrrr, normal etc. at a frequency of 1-2 seconds on then 1-2 seconds off. As soon as the car hits 4th the noise/vibration is gone.???
2. When cruising above 75mph (80-90mph) the car has a rapid frequency nervousness (ie dash shakes like a nervous person before an interview). It doesn't feel like it's coming from the tires. What else could it be??
 
I had vibration at 70-90 roughly and had the driveshaft balanced and it all went away so you might want to see if you can get it balanced and see if that helps.
 
do the simple stuff, check for loose trans mount bolts, u-joints etc. Jan may be right, he ussually is....
 
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