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Disco 300 TDi


paddywack12
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I have started to notice an odd noise when driving my Disco.

 

When I slow down (take foot off accelerator) I can hear a strange noise cant really explain it but its like a constant whine or rubbing sound :blush: but stops as soon as I accelerate and speed up.

 

Anyone got any ideas what this could be?

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Out of question are you sure the noise disappears when you speed up or does your engine just drown it out ?

 

 

 

 

 

I'd be inclined to remove the wheel bearing option as that should really be a constant, the props being worn could still create that noise though as could the diffs if worn and pitted from **** getting in there

 

 

 

Your worst case scenario is the t'fer box but it could simply be a worn input shaft

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I'd test for the easiest then

 

Give the props a shake in that case and see how much play there is, if theres a lot its most likely them on the way out and you don't want one to snap when you're cruising along at 70

 

 

 

 

If theres no excessive play then they can be rules out

 

 

 

 

 

Can you locate the whining to the front or rear ? if its the rear you can eliminate the t'fer box and gears too

 

Or if you can't locate it does the noise get worse after the disco's been run for a while ? in that case it would be a lubricated part

 

Oh, and while you're checking the UJ check the donut

 

Could be as simple as that, £20 fix in that case

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Noise definatly disappears when speeding up as the engine is really quiet.

 

The whinning noise is louder than the engine.

Sounds like either gearbox output shaft bearing or rear diff prop-flange bearing -- whines on the over-run.

Check all oils levels 1st and for leaking seals. Top-up + retry.

Check for lift-worn diff flange bearings.

 

Drain and replenish with new oils (to the filler levels) in both axle diff casings and the gearbox and transfer box ,

check rubber doughnut on prop for splits /renew if required.

Check all four wheel bearings for excess free play and rough worn bearing, often as not its the fronts that need attention.

 

Check all propshaft UJ`s for excess play/wear + either renew if too worn or grease gun the nipples on uj`s if not worn anyway.

(That so reminds me of a story once when Clad in overalls and my greasegun in hand,,-- well she did ask what it was for :D )

 

Failing else,

I find leaving Mrs Wabbits at home works wonders :lol: :lol: No noise whatsoever :yes:

Up goes the stereo - - "pump up the volume" :yes:

Edited by mrwabbits
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Sounds like either gearbox output shaft bearing or rear diff prop-flange bearing -- whines on the over-run.

Check all oils levels 1st and for leaking seals. Top-up + retry.

Check for lift-worn diff flange bearings.

 

Correct :( apparently i need a new rear diff. Getting a second hand one fitted next week.

 

£200 to fork out before Christmas :sad1: Mrs wont be happy

Edited by paddywack12
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