Originally Posted by The HACK

If you guys received the shifter in the group buy, make sure to call B&M and talk to one of the service representatives and ask for the lock washers in place of the OEM flat washers when you install. Or go to a local auto hardware store and buy 3 serrated lock washers for like $.30 ea. The serrated lock washers prevent the OEM plate from loosening up and moving around, which causes the "rattle" noises that plagues 350Z shifters. Sometimes the top plate will move far enough where you'll lose the reverse lock-out.

If the B&M service reps don't know what you're talking about, ask them to speak to their VP of Engineering to clarify.