Loose bolts .... worn bushings(should have caught that during install)
Improper gear lash. loose pinion gear ...... etc
Bottom line if its under some kind of warranty, let them look at it and properly diagnose instead of forum inquiries of what's wrong.
I'm assuming that you had someone install it for you.
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[B]2009 & 2017 370Z Touring Sport Autos SOLD
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