sw- your 7sp has a torque converter. There's your problem.
1Slow370z- thanks for the info. Most cars I've had were pretty stubborn to get into 6th when new, so I can understand why you didn't address it earlier to the dealer.
Keep us posted what the problem was.
So far my Z has been very smooth to get into all the gates. Was actually surprised how smooth it got into 6th.