whirring noise only on 5th gear

[rickycyng]

hey guys~ i get this whirring noise only when i accelerate on 5th gear @ 60km/h. i think the noise is still there wen im on 80km/h but less noticable as i go faster. dyu guys no wot could b the problem? thanks =)

 

[UrbanD]

I see that this hasn't been sorted out yet? Well I have the same problem... Only in 5th gear when I accelerate, there comes the tiny whining noise (piiiiiiiii) and as soon as I put it to neutral, it goes away... And then I put it back into 5th and here it is again. What could this be?

 

[MicKPM]

When was the gearbox oil last checked/changed? Could be the common JC5 5th gear end nut issue but i'd get it looked at to rule out something simple Vs something terminal. Does it "crunch" or jump out of 5th at all?

Mick