Hi It seems that my gearbox (5-speed) needs rebuild. The first gear has made some noise for long time now. I'm wondering that should I just rebuild it to 6-speed or buy used one. I could get 6-speed, driven 148kkm (92kmiles), $1600. Opinions? -Miikka Salonen- urS4 -92 240kkm, with MTM 380 hp and S6 conversion