I have just had my 2nd gear synchro replaced on my 2004 6-Speed GRF gearbox and the crunch going from 1st to 2nd has greatly improved although it still feels like their is a little notch as it goes in to 2nd.
Could there be something else at fault or are all 6-speed boxes like this ? I have filled the box with G052911A2 oil which isn't bad from a cold start and isn't cheap!!!. I have read about G060726A2 oil which is mineral based and alot cheaper than the other stuff - would this help or make it worse do you think ?
Should I try thinner or thicker gearbox oils? The clutch, flywheel and slave cylinder were also replaced at the same time the box was out so I can rule these out.
Could someone also tell me if 02J and GRF is the same gearbox as I'm sure the sticker on my car says my box is GRF although I could of sworn I read 02J on the bottom of the box?
Any help would be greatly appreciated as It is driving me nuts and spoils what is overall a good car.