The transmission shouldn't make a grinding sound when in full auto or manual mode. The 2nd to 1st shift may feel a little harsh at times, g37 owners also have this problem. There's no reason to shift into 1st unless you're about to come to a stop. I don't really see this creating a problem for the transmission because nissan would of prevented the driver from shifting into 1st at a certain speed.
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2010 k23
H&R sport springs / Spc rear camber arms / SSR SP1 / Berk cbe / Varis cf lip / Nismo S-Tune side skirts
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