R34 Gt (rb25de) Manual Transmission Problems

[Jayden.K]

Hi, recently my r34 grinds when trying to get it into reverse, what bothers me the most is that it happens at random times, sometime it will sometime it wont, i have checked my clutch fluid its fine, i have try to pump the clutch but does not stop the problem, so before i try anythings else has anyone had this trouble or any suggest on a fix for this

thankyou

[Jayden.K]

also have notice a noise coming from the gearbox, if i push the clutch in it will go away, would this be a worn throw-out bearing?, could this be a reason why my clutch or pressure plate is not working properly? all my gears feel ok, not the smoothest gear changes in it but its been like that sense i have had it, the grinding in my reverse is a recent issue.

Edited October 28, 2010 by Jayden.K

[lawbrkr]

also have notice a noise coming from the gearbox, if i push the clutch in it will go away, would this be a worn throw-out bearing?, could this be a reason why my clutch or pressure plate is not working properly? all my gears feel ok, not the smoothest gear changes in it but its been like that sense i have had it, the grinding in my reverse is a recent issue.

yeah mate it sounds like the thrust bearing is stuffed which normally is a tell tail sign the clutch is on it way out

[Jayden.K]

yeah mate it sounds like the thrust bearing is stuffed which normally is a tell tail sign the clutch is on it way out

ok cheers mate, will post if this is the fix

[lawbrkr]

ok cheers mate, will post if this is the fix

how did you go with it mate

[Jayden.K]

how did you go with it mate

have not done it yet, this weekend i will be all over it

[simpletool]

IF you push the clutch in and it goes away then it 99.5% isn't the throw-out bearing. In fact the throw out bearing is what you ARE using when you push the clutch in.

This has nothing to do with a problem in reverse (well it might be if you got the wrong type/height - but then it would be doing it the whole time, not just now or now and then , or only for reverse.)

Anyway, have you driven many manual RWD drive cars before? ie. Is it just the fact that reverse can be a bit of a bitch in any chunky gearbox car?

btw...sounds like a bearing race in the gearbox has be slightly crushed/deformed causing alignment issues and noise - BUT I am no gearbox expert. So take a grain of salt with this. mmm...salt.

Edited November 9, 2010 by simpletool

[jrm]

Typically if the noise goes away when you put the clutch *in* then it's the input shaft bearing.

You may also find you get a whine in the gearbox that only goes away in forth gear, as forth gear is the only time no load is put on the cluster shaft bearing. (This is another bearing that is known to wear).

Both of those are relatively cheap parts to replace, but obviously the labor on them make it into a situation where you may as well start replacing synchros, etc if you're gonna crack the box open.

I'd probably take the car into a gear box specialist. They'll probably take the car for a drive and advise you appropriately.

[Jayden.K]

thanks guys helps heaps, im replacing my clutch, throw out bearing and pressure plate. i hoping its the fix for the grinding and the noise (fingers cross)