apac

iTrader: (2)

My 6 speed JDM gearbox is crunching when changing into 4th (at high speed only). I'm presuming it's a worn sychroniser ring? but am no expert. the part itself is cheap but anyone like to hazard a guess how much it would cost to have gearbox out and get the part/parts replaced?
Also, is 4th a single, double or tripple synchro.

Anyone had this problem?

cheers

Edited to say: this has only started happening since recent gear oil change. Immediately after the oil change i noticed that the gear change in all gears was also harder/notchier.
gear oil used was MOTUL 300 75W/90 (3 litres) - this info is taken from the service invoice

apac

iTrader: (2)

Update. Have checked gear oil level and it's just above the full mark on the dip stick, so the '3litre' on the service bill must be a miss print.?