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Discussion Starter · #1 ·
Can the main drive shaft be balanced? , thinking mine is out of balance tore main trans seal , Nissan put in a new trans , then bell housing went , put new housing in and then had trans built and motor built when I did the alpha 9 now new trans seal area is ticking sometimes and if I'm in park if I rev to 3500 car shakes then clears up at 4000
 

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Vibrations when revving the engine in park should not be caused by the driveshaft as it would not be rotating....
 

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Vibrations when revving the engine in park should not be caused by the driveshaft as it would not be rotating....
Trans in back
 

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Trans in back
So due to the layout of the GT-R with the transmission in the rear the driveshaft spins in relation to the rpm's even in park? If this is the case then it's true, you learn something new everyday lol.
 

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The main prop shaft is always spinning if the car is running. The FWD shaft only spins when the car is in gear.

To the OP. Have them check the drive shaft bolts first. The drive shaft is balanced by the factory, but I have also heard of it throwing weights on rare occasions. If the bolts loosen, you will get vibration. I had a similar problem, but it was between 1500 and 2200 RPM. My bell housing was just flat wore out.
 

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Did you ever get this resolved? Curious to see what your fix was. I'm getting vibration now and I do not believe it's no the bell housing.
 
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