Gearbox Issues

[Seano350GT]

I have a 2003 V35 350GT Coupe, the gate between 4th & 5th ALWAYS grinds a little bit and i cannot seem to stop it unless i change gears very slowly.

This grind also occurs when going from 6th down to 5th, any feedback would be greatly appreciated.

[turboedsloth]

Sounds like a worn 5th synchro

[Seano350GT]

How do you go about fixing a synchro? I am completely clueless when it comes to drivetrain

[89CAL]

Box out for an overhaul. Not something to try yourself if you haven't done it before.

Price wise, probably cheaper to find a second hand box (although I'm not sure what v35 boxes go for)

[Seano350GT]

Strangely enough i went for a drive last night and it didn't grind at all going into 5th, i haven't done anything that could fix it so it seems to have magically fixed itself?

[blind_elk]

Cheapest attempted solution would be to change the gearbox oil to a slightly heavier grade.

[89CAL]

yeah try some redline lightweight, seems to help alot of people. Be alot cheaper then a rebuild

[mungy]

yeah try some redline lightweight, seems to help alot of people. Be alot cheaper then a rebuild

bad idea, hiding the problem is not sorting it out, if a car presents a problem you need to fix it not cover it up or later it will make things much much worse and MUCH more expensive

[89CAL]

bad idea, hiding the problem is not sorting it out, if a car presents a problem you need to fix it not cover it up or later it will make things much much worse and MUCH more expensive

Did you read this whole thread? I already said the gearbox needs an overhaul then sean said the issue has gone away. That's what I said it might just need new oil

Read everything next time