Noise while under load

Teal2008 · Dec 19, 2019

Hi all I have a discovery 300tdi that makes a droning noise while under load. The faster I go the louder the noise. Its not wheel bearings or tyres. The noise goes away when you let off the throttle. Any ideas I'm not sure if it's possible diff related

tilly2 · Dec 20, 2019

Have you checked the oil levels in your diffs, and boxes. That's a starter for ten.

Europa486 · Dec 20, 2019

Usually the diff, as said check oil but I would drain and refill in case of water ingress,

Teal2008 · Dec 20, 2019

I replaced all the diff oils and gearbox oil about 6 months ago. Nothing appears to be leaking

Europa486 · Dec 20, 2019

If you can locate the direction of noise, ( front / Rear) then remove the prop shaft in that direction, centre diff lock in and road test, If noise is gone that’s the diff to look at, checking the pinion nut for correct torque but still likely to be diff replacement or rebuild,

Stanleysteamer · Dec 20, 2019

Had the same, on rear diff, turned out to be pinion not torqued up. Freeplay, sideways movement, was noticeable once prop was removed. Thought it was going to be bearings. Twasn't, just tightening it up did the trick, (replaced the seal at the same time).
Best of luck.

Noise while under load

Teal2008

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tilly2

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Europa486

Well-Known Member

Teal2008

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Europa486

Well-Known Member

Stanleysteamer

Well-Known Member

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