Strange scraping noise when rolling in gear. (Disco 300Tdi)

When I come of the gas and roll the Disco whilst still in gear there is a scraping noise coming from somewhere, can't figure where abouts. When I press the clutch pedal, so the car is basically freewheeling, the noise goes away :-S any ideas people?

check ujs then remove one prop at time and run in diff lock ,when props off make sure joints and slide arent siezed noise usually diff on over run ,if noise goes with front prop off front diff rear , prop off rear diff

jamesmartin said:

check ujs then remove one prop at time and run in diff lock ,when props off make sure joints and slide arent siezed noise usually diff on over run ,if noise goes with front prop off front diff rear , prop off rear diff

Click to expand...

Confused me there pal :-S

check propellor shaft universal joints,remove one of the propellor shafts and test drive your vehicle while diff lock is engaged,if either shaft stops the noise occuring it will be the differential the prop was bolted to

jamesmartin said:

check propellor shaft universal joints,remove one of the propellor shafts and test drive your vehicle while diff lock is engaged,if either shaft stops the noise occuring it will be the differential the prop was bolted to

Click to expand...

Cheers pal! I'll have a look at weekend. When i put diff lock on yesterday the dash light seemed to be flickering or dimming when I applied the gas. If it is one of the diffs, any ideas as the cost involved in repair or replacement?

I had a strange noise last year and it ended up being the dust cover on my read diff input. I just removed it because my 300 is a Chelsea tractor .

gregc said:

I had a strange noise last year and it ended up being the dust cover on my read diff input. I just removed it because my 300 is a Chelsea tractor .

Click to expand...

Would it come and go with the clutch pressing?

............

does it do it when stood with engine running

jamesmartin said:

does it do it when stood with engine running

Click to expand...

No only does it when the car is moving whilst in gear with no gas on.

My noise started similar to that ( it would go away when under power). It sounded like a speedo cable (but obviously after ripping my dash apart I realised the 300 tdi doesn't have one!!!).

rlj86 said:

When I come of the gas and roll the Disco whilst still in gear there is a scraping noise coming from somewhere, can't figure where abouts. When I press the clutch pedal, so the car is basically freewheeling, the noise goes away :-S any ideas people?

Click to expand...

Does the noise go away if you lightly touch the footbrake?

thebiglad said:

Does the noise go away if you lightly touch the footbrake?

Click to expand...

No

Right, managed to get gold of the guy who does work on my car and he seems to think it's either gear box or due to some play in front prop. Also mentioned it looks like one of the seals has gone near the prop, forgot where he said. Asked him to have a look as noticed some oil on road outside, engine oil level is fine. Does this ring true??

front tbox oil seal? check UJ's and output shaft for play.

I had this problem, it turned out to be the rear UJ on the front prop.

you havent removed props one at a time and tried it in diff lock have you starting with front prop cos till you do cant get much further,most transferboxes or diffs leak somewhat,so doesnt necessarilly mean anything

The Mad Hat Man said:

front tbox oil seal? check UJ's and output shaft for play.

Click to expand...

I think that's what he said

jamesmartin said:

you havent removed props one at a time and tried it in diff lock have you starting with front prop cos till you do cant get much further,most transferboxes or diffs leak somewhat,so doesnt necessarilly mean anything

Click to expand...

No, I have been working all week, managed to catch him after work to take a quick look at it

try with front of tomorrow