Discovery G.Box/T.Case whine - speed related

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Originally Posted by ladas

That is the charcoal canister, part of the emmission control system, it absorbs excess fuel vapour and purges it back to the fuel tank.

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Ok, well I feel a little dumb now - at least it is clear to everybody that the CDL if not vacuum operated on my S1 Disco.

Back to the whine guys... any further thoughts? (I humbly ask)

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Originally Posted by chosen

The cruise control has also just recently stopped working (for another post on another day) - wanna test that very vacuum control box once this whine problem has been rectified.
Cheers,

chosen.

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I had a similar problem with my cruise control.......it was a split in the vacuum hose at the T-piece behind the window washer reservoir.
Check out all the hoses, as they are probably perished by now.

Cheers
Paul

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Originally Posted by Caveman

I had a similar problem with my cruise control.......it was a split in the vacuum hose at the T-piece behind the window washer reservoir.
Check out all the hoses, as they are probably perished by now.

Cheers
Paul

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There is still vacuum at the very end of the pipe near the vacuum pump (front passanger side) if I suck on it. The hose at the T-piece is all good too. Did the cruise control light come on (or did it try to work) when you engaged it whilst it was broken?

Cheers,
chosen

While I remember, the 2 months or so that I've owned this Disco there has been a fair bit of back lash in the gearbox/transfer case/diffs or somewhere anyhow. I don't know if this sheds some more light on the whine problem.

On ya all!

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Originally Posted by chosen

:oThat's interesting, did it still make a (now let me describe it right) gritty sounding, slightly crunchy vibrating whine when the Hi/Low gear box was in neutral and you go through the gears - especially in 4th and 5th?

I took it for a nice and long reverse drive just now and it has made no difference - end of diff lock theory???

The sound as I just described is being produced even when the Transfer case isn't engaged - would this mean that the problem is with the gearbox?

Thanks again to all who have commented thus far,

chosen.

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OH CRUD... ok so im on the ummm dunno woodtsock but

if its the 77 driving the lt230 your primary support bearing in between the 3rd/5th (4th is direct remeber) is worn and the outpust/layshaft gears are doing the same hting as per the earlier post on the lt240 intermediate shaft....

if your lucky youve caught it in time and the mainshaft and layshaft are ok (albiet on the limit of wear) then is new bearings and live with the noise....

its actually cheaper to get a reco box than it is to outright purchase the main shafts and layshaft + bearings and the synrocs on 3rd + 5th that will be shot as well...


Yee hah....

HTF Im wrong....

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Originally Posted by chosen

There is still vacuum at the very end of the pipe near the vacuum pump (front passanger side) if I suck on it. The hose at the T-piece is all good too. Did the cruise control light come on (or did it try to work) when you engaged it whilst it was broken?

Cheers,
chosen

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Yes, the cruise control light did come on, on the switch with mine.....it just didn't hold the spedd when you pressed the set button.
My vacuum pump was fine, just with the leak, the control bellows on the throttle body was unable to move the throttle cable to adjust the speed.

Mine was a simple vacuum leak.

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Originally Posted by Blknight.aus

OH CRUD... ok so im on the ummm dunno woodtsock but

if its the 77 driving the lt230 your primary support bearing in between the 3rd/5th (4th is direct remeber) is worn and the outpust/layshaft gears are doing the same hting as per the earlier post on the lt240 intermediate shaft....

if your lucky youve caught it in time and the mainshaft and layshaft are ok (albiet on the limit of wear) then is new bearings and live with the noise....

its actually cheaper to get a reco box than it is to outright purchase the main shafts and layshaft + bearings and the synrocs on 3rd + 5th that will be shot as well...


Yee hah....

HTF Im wrong....

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Wont be a 77 on a 1996 Disco, it will either be a R380 manual or a ZF4 auto

seee , Eye for details,,, that goes wright out the window when your drunk.....


which explains why uyou pickk up ugly women at 3 am in the morning during a bender.... and i aint talking about the precocious robot from futurama...

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Originally Posted by Blknight.aus

seee , Eye for details,,, that goes wright out the window when your drunk.....

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It sure does, he he he!!!


OK well I have for you all a very bad quality recording of one of the sounds... 5th gear revving with the Hi/Low box in Neutral. You can just make out some of the crunching sound. It is only 486KB so wont take long to download.

5thGearNeutral.mp3

PS, I have a daily updated version of AVG Professional Virus Scanner - I'm confident it's clean but it is your choice to download it.

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Originally Posted by Caveman

Yes, the cruise control light did come on, on the switch with mine.....it just didn't hold the spedd when you pressed the set button.
My vacuum pump was fine, just with the leak, the control bellows on the throttle body was unable to move the throttle cable to adjust the speed.

Mine was a simple vacuum leak.

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Cheers, with the cruise control in my Disco no lights come on when I press the activation button nor does it try to engage. Funny as I drove all the way back from Sydney with it working fine - it just stopped working too!

I'm thinking this problem might be either the vacuum pump or electrical.

chosen ;-)