trust me
start looking for a replacement ax5
grinding during down shifting is fine,.. just don't do it anymore (save your gears) unless you know how to properly double clutch to speed match the tranny to the motor.
Once you start grinding while upshifting into 2nd,.. really learn how to double clutch,.. if you are careful, you can have a good 6 months like that, maybe 8.
then 4th will go,.. but once 5th goes,.. just give up LOL