You use motor oil in your transmission? Color me confused... But I don't remember it having this issue before I asked my dealer to switch out the transmission fluid...
As for OP, did this answer any questions?
i ran amsoil 10-40 in my 5spd for like 2 years , 3rd gear would grind. have been running penvoil syncromesh for over a year now with rarely any 3rd gear grinds. only time i grind now is when i mis shift.
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