Vehicle & Technical > Discovery

Grinding noise

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andygod:
I have a grinding noise coming I think from the rear of my discovery. At first the noise was very faint and only noticeable when in slow moving traffic (approx 5mph). Over the last few days the noise has got louder and lasts until I reach approx 30mph. The noise isn’t extremely loud but is clearly audible, it maybe that at over 30mph the noise is still present but is masked by the road noise at this speed. The sound is like metal rubbing against metal. Before I start stripping things down has anybody experienced this before or has any ideas. The main culprits are diff – low on oil or damaged, breaks – noise doesn’t get worse when I apply the breaks though, u.j’s on the prop shaft – lack of grease or worn out (John can I have my grease gun back), wheel bearing – only replaced about 3,000 miles ago.

If you have any ideas I would be most grateful. I’m going to jack the rear and spin the wheels to try and trace the culprit but a bit of guidance would be great

Xtremeteam:
i think i know

check the outer brake pads havent droped through the calipers & are grinding on the discs

if so needs new pads & new calipers

BTDT

Eeyore:
First suggestions would point towards the wheel bearing. Sometimes the new bearing will require nipping up after a period of settling in.

How is braking performance? If there's noticable sponginess in the pedel this is another good indication that a bearing is playing up.

As an outsider it could also point towards the input bearing in the diff nose. Aside from that, you've covered most of the usual options in your list.

anyhoo, give it a spin and let us know what you find.

Cheers
 8)
Eeyore

Xtremeteam:

--- Quote from: "Eeyore" ---First suggestions would point towards the wheel bearing. Sometimes the new bearing will require nipping up after a period of settling in.

How is braking performance? If there's noticable sponginess in the pedel this is another good indication that a bearing is playing up.

As an outsider it could also point towards the input bearing in the diff nose. Aside from that, you've covered most of the usual options in your list.

anyhoo, give it a spin and let us know what you find.

Cheers
 8)
Eeyore
--- End quote ---


im quite confident its non o them :wink:

chuggaman:
check brake pads and bearings..look for up and down or side to side movement at the diff..check the ujs for play by twisting and moving the prop..


mike

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