I have this exact problem. It first started early last year when I would shift really fast from 2-3 it would grind. Since then, it's steadily gotten worse and worse and now, I have to match my revs perfectly or I grind going into 3rd gear. Makes going on a 0-60+ sprint or passing car's really annoying becuase I have to wait for the revs to match right before I can put the shifter into 3rd.
I've opted to just replace my tranny with a rebuilt unit with quaife.... I can't wait to shift normall again!! It's been over 18 months dealing with this thing....
VRRRROOOOM! 1-2 shift VROOOOOM!!!! ....2-3 shift (waiting for revs to match)........................................VROOOOM!!! 3-4 shift VRROOOOOM!
Trust me. It sucks after 18 months. Your car won't even be fun to drive at all anymore, and you'll be completely uninspired to go on the twisties (which usually taxes 3rd gear more than any other).
I haven't had ANY problems with the other gears yet, and the only thing thats gotten worse is how hard it is to match revs right to prevent grindage. But who knows what will happen to 3rd gear if I just kept driving on it....
