driving back down south from scotland the other day and i noticed a scrapeing/werring sound happening whenever i was inbetween accelerating and decelerating on the motorway, after having another drive i have noticed it is only happening at the point where the strain comes off the engine and once my foot is completely off the accelerator this noise stops, however..... the second i put my foot on the clutch to change gear the noise starts again, if i then take the car out of gear, still rolling lift my foot off the clutch the noise continues? anyone still following at this point ?
lastly i tried to put the car in neutral whilst rolling not using the clutch at all and not touching any pedals the second the car is out of gear the noise starts again until i have put it in gear again and accelerated away?
the faster im going the faster/louder the noise, under 30 you can still hear it but very quietly and in a very specific point on the accelerator.

Anyone got any ideas?


thanks
Dave

rugbynut129 said:

driving back down south from scotland the other day and i noticed a scrapeing/werring sound happening whenever i was inbetween accelerating and decelerating on the motorway, after having another drive i have noticed it is only happening at the point where the strain comes off the engine and once my foot is completely off the accelerator this noise stops, however..... the second i put my foot on the clutch to change gear the noise starts again, if i then take the car out of gear, still rolling lift my foot off the clutch the noise continues? anyone still following at this point ?
lastly i tried to put the car in neutral whilst rolling not using the clutch at all and not touching any pedals the second the car is out of gear the noise starts again until i have put it in gear again and accelerated away?
the faster im going the faster/louder the noise, under 30 you can still hear it but very quietly and in a very specific point on the accelerator.

Anyone got any ideas?


thanks
Dave

Click to expand...

It does not sound like a clutch problem to me. Check your gear oil level first, before anything.
Not sure what gearbox you may have, but it sounds a bit to me like your gearbox has a collapsed bearing or bearings in the cluster gear or the first motion, (input clutch to gearbox) shaft.
One way to possibly verify this is to drive along in 4th gear, this takes all the load out of the cluster shaft, because 4th gear is a straight through lock up of the main shaft, all others,1, 2, 3, 5, and reverse, form a gear train through the cluster gear shaft. Try the same operations you carried out when the noise was discovered, if the noise is reduced sinificantly or completely eliminated it will indicate a cluster gear bearing problem.
If the noise continues, whilst the car is rolling at road speed leave the gearbox in 4th gear, depress the clutch, let the engine idle, if the noise gets worse this could indicate that the first motion or input bearing is munched.
A friend of mine had a first motion bearing collapse in his LT77 gearbox last year after letting the oil level get too low, it completely burned the first motion gear and it's mating cluster gear off to blackened melted mess, one fubared gearbox.

Is this on your lightweight ?

Cos you've posted it in the Disco bit ...

yeah sorry ths is on the new 300tdi manual disco