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AMD74

Member Since: 16 Dec 2022
Location: Cumbria
Posts: 4

Unusual noise from drivetrain

Why is nothing ever a straight forward fix!!

So I’m getting a strange noise from what I’m pretty certain is the drivetrain. The best way to describe it is like a plastic/tinny flapping/ticking almost like a fan blade catching. It gets slightly louder under load but is there all the time at all speeds. Only present when moving and increases/decreases with the road speed. It’s been in to the local Land Rover specialist this week and they’ve drawn a blank after giving the drivetrain a once over, changed oil in front and rear diffs, transfer case and gearbox, checked uj’s etc.

Both front bearings and swivels have been replaced in the last twelve month so it shouldn’t be related to these.

The mechanics conclusion is that it could be the front diff giving advanced warning that it’s on its way out but I always thought that produced more of a whine.

It’s a 110 td5 2001 with 127k on the drivetrain (75k on the engine). Its stage 2 tuned so will be putting more strain than usual on the drivetrain I just would have thought other components would fail before the diff.

Any thoughts would be appreciated because I’d rather get it sorted than drive it until something goes bang!

4th May 2024 1:53pm

4RF RDS

Member Since: 19 Jul 2015
Location: Ottawa
Posts: 933

2000 Defender 110 Td5 XS CSW Epsom Green

Consider that it could be prop shaft u-joints. Remove the front one and drive it then the rear to isolate if you are not sure.

Good luck 2010 Range Rover MkIII Autobiography Super Charged (Idris)
2003 Range Rover Mk III (Desmond FitzWilliam)
2000 Defender 110 CSW TD5 (CTX)
1992 Range Rover Classic (Lizzy)
1972 Series III 300 Tdi (Stanwood)
1967 MGB GT

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4th May 2024 8:16pm

AMD74

Member Since: 16 Dec 2022
Location: Cumbria
Posts: 4

UJ’s are good, the front one was replaced 12 months ago.

4th May 2024 8:31pm

custom90

Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20371

Could be CV’s, though that tends to be a sort of clicking. $W33T $0U7H3RN $UG4R
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4th May 2024 9:35pm

AMD74

Member Since: 16 Dec 2022
Location: Cumbria
Posts: 4

I did consider the inner cv joint but there’s no knocking when pulling away or shifting gear and not sure if the click the same as failed outers?

4th May 2024 11:20pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17384

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

What do you mean by "inner" and "outer" when speaking of CV joints?

12 months is quite long enough for a prop shaft UJ to fail, especially if it was a budget part. I would rule it out without checking.

5th May 2024 9:28am

Retroanaconda

Member Since: 04 Jan 2012
Location: Scotland
Posts: 2647

Diffs can click too. Loose crown wheel bolts for example.

5th May 2024 4:23pm

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