I hate to brake it to all of you, but changing you're fluid isn't going to help a bad synchro, which, if you only have the problem higher up in the rev range, that is the problem. Take it to Acura, they'll tell you the same thing right away. If you can shift in a lower Rpms with out grinding or forcing it in, but at higher Rpms it doesn't want to go, or grinds, then that's a synchro thats shot. Good Luck with it though.....

Aj