Originally Posted by Cyber370

My 2016 Nismo has been like this from new. The 6-speed tranny in our cars was designed for fast/smooth shifting at high speed in the upper RPM ranges. The downside of this is when driving slow and shifting at low RPMs you may get slight grinding or rough engagement. You need to slow down your shift speed to allow the synchros to engage. This is especially critical with the 1st to 2nd shift for some reason.

Rule of thumb: Drive fast, shift fast. Drive slow, shift slow.