D3 - High-pitched whine, rear diff

Good to see you got it back....

You can finally enjoy your new car!

Glad to hear that got fixed up !

Mine is off for a rear diff next week ... May have jinxed myself by participating in this thread haha. 1500 brand new LR diff fitted by a dealer including 2.5hrs of diagnosis done at no charge. Happy with that !

Quote:

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Originally Posted by morpheus

Hello all,

So I picked up the car yesterday - both Diffs replaced, at their cost. No more whining diff noise. Took long enough, but I am stoked to have the car back.

So I guess I will now see how long it takes for the transfer case to die... :)

Look forward to waving at friendly D3/4/RRS drivers around Canberra.

James

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Don't be so negative. Transfer case will be fine.

It's the torque converter, air compressor, front lower contorl arms, brakes, coolant system, shocks, air springs, central locking, sway bar bushes that you'll have to do next.:wasntme:

Yeah, what could possibly go wrong...

Geez, it is a completely different car. So quiet, especially compared to our Ford Territory (which seems to have horrible road noise now..). Although I am starting to pick up other noises I never heard before, as they were no doubt drowned out by the diffs. I seem to have a shudder at 90 kph, which seems to dissipate after 100kph. From what I have read here this could be gearbox-related? Anyway, I will enjoy the car for a bit and take it to an independent sometime in the near future. The car has been out of my hands for too much of my short duration of ownership.

Did they advise what has failed on your diff?
my guess would be pinion bearing. check out this link of a inside photo of D3 rear diff:
Failurehttp://www.cutawaycreations.com/IMAGES/car4/images/image8.jpg

Hi, Leigh 110.

Nope. Told me that they had replaced both diffs, and gave me the keys. Whatever they did the whine and vibration is gone.

James

Quote:

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Originally Posted by Leigh 110

Did they advise what has failed on your diff?
my guess would be pinion bearing. check out this link of a inside photo of D3 rear diff:
Failurehttp://www.cutawaycreations.com/IMAGES/car4/images/image8.jpg

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For some reason the link won't work, but I am using a mobile..

Seems strange that they replaced both diffs!!
If i was you I would be flushing the diff oil again after 10,000kms, if they have replaced diffs, would be interesting to see how clean the oil is.
Alot can be said for oil changes, diff oil should regularly be changed, I do it in every vehicle I own, its alot cheaper than rebuilds. :o:o

Quote:

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Originally Posted by morpheus

Yeah, what could possibly go wrong... Geez, it is a completely different car. So quiet, especially compared to our Ford Territory (which seems to have horrible road noise now..). Although I am starting to pick up other noises I never heard before, as they were no doubt drowned out by the diffs. I seem to have a shudder at 90 kph, which seems to dissipate after 100kph. From what I have read here this could be gearbox-related? Anyway, I will enjoy the car for a bit and take it to an independent sometime in the near future. The car has been out of my hands for too much of my short duration of ownership.

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Two new diffs is a huge plus. The shudder could just be a lose or worn gearbox mount. Sourcing an underbody noise can be really difficult, as noise seems to travel.

The trouble with very quiet cars (from someone else's comment a while back) is that when you eliminate one set of noises it just means your ears hunt down the next one ...

Morpheus, you should drive and drive it to get familiar with what is normal and what is not. Mine has some noises that are - odd - but experience says they're normal and have been the same for 90,000km + !

Totally get your road noise comment ... :) but which is worse for wind noise (terry or disco) ? Wind noise in mine at 110+ drives me nuts sometimes (and it is completely normal from other d3/4s I've been in).