I had grinding going into third from beating on my tranny so much. I was looking at getting a 2100 dollar rebuilt tranny, when the local race shop suggested Red Line tranny fluid. It's 8 bucks a quart, but it'd worth it. My shifting is restored to new and I got third back!

If you don't know how to change your tranny fluid, pm me, and I'll provide some details generic to Honda. It's not like changing your oil, you need tools.