Try changing the fluid? It has been known to completely get rid of third gear grind in some instances.
I'd say try Redline MT90. I ran that this summer and it worked great.
Former owner of '99 CSVT - Silver #222/2760
356/334 wHP/TQ at 10psi on pump gas!
See My Mods
'05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red
'06 Mazda5 Touring, 5spd,MTX, Black
