My 6th gear synchro was failing and I had the whole transmission replaced under warranty. This is most likely your problem, they should take care of it for you.
I had one tech blame it on shifting from 4th to 6th since it was more prevalent in that situation, but it shouldn't grind regardless. I pushed the issue with someone that actually could make decisions and it was handled. Took about a week.
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2009 NISMO # 0193 | QAB | Albums! | 05.04.10 (Dynojet) 291.94hp/248.28tq
Oil Cooler (DIY) | Custom Headlights | GTSPEC Braces | F.I. Long Tube Headers
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