I just picked up an 07 350z 6spd with 22.6k on it this weekend. When shifting into 5th gear i have to really push to get it in. Even when the car is warmed up. It feels like trying to shift into reverse(for all the other manual cars i have driven) when you just started your car in the morning and its 10 degrees outside

 

If you use the search you shall find a thread with the answer to your question but if you just bought it bring it to the dealer and take them for a ride and show them the problem it should be under warranty so it is free!

 

One new tranny coming up.

 

I think you need a new transmission. Sorry.

 

damn, well at least its under warranty