Rear end clunk

Thanks Bob.

Its been a long time since I accessed TOPIX and of course now it won't let me in using my VIN. Any chance you could screen capture that TOPIX for me?

Cheers,

Mark

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Originally Posted by BobD

See my post #4 above. The centre ediff causes this issue. It doesn't have to have a rear ediff, although that can also cause the problem. It is a known problem on Topix, especially for early L405 Range Rovers.

Topix says to do two transfer case oil changes and then recalibrate the transfer case. When turning corners the centre diff also has to be released due to the different speed between the front and rear axles. If not properly released there is a loud clunk from the rear end as it slips. This happens when accelerating around corners, such as T Junctions, after slowing or stopping for the intersection but will also clunk when coming off a beach onto a hard surface, for example.

Its nothing to do with tyres or the rear diff, even though it fells like the rear diff has a tooth missing on the crown gear when it happens. I had it on my L405 and heaps of people are having it on their D5's, although they ignore anything I say about the transfer case causing the problem and continue to blame the ediff if they have one, even after the problem continues when they get it replaced under warranty. Just ask the dealer to recalibrate the transfer case and change the oil, as per the Topix information.

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Originally Posted by WhiteD3

Thanks Bob.

Its been a long time since I accessed TOPIX and of course now it won't let me in using my VIN. Any chance you could screen capture that TOPIX for me?

Cheers,

Mark

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Sorry, I don't have access. I paid for access when I had the issue on my L405, printed the instructions out and gave it to my indie, who did exactly what it said. This fixed the clunk for the next 60,000km until I traded it in on my D5. This was a known fault of the early L405's, which mine was. It now appears to have raised its ugly head with the D5 as well but I don't know whether there will be anything on Topix specifically for the D5 transfer case clunk.

If you search for my posts on the L405 you may find the procedure in a post. I posted about it but I don't know where it is. I remember that you needed to change the oil and recalibrate the transfer case and I think it required two oil changes. Someone in the D4 section also posted the same information for the D4 transfer case, which gave me the idea to look on Topix for the RRV.

My indie said the oil was black due to the transfer case being wrongly calibrated at the factory (this was at 40,000km when I bought the car) but there was no permanent damage and all was good after changing the oil and recalibrating the TC.

I change all my oils at the 12000km range as being a mechanic this goes against everything that i know about did all the, did oil samples at same time and of course metal was high from "bedding in" will do a sample on all compartments again and post the results, warranty runs out in 7 months.

Quote:

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Originally Posted by BobD

See my post #4 above. The centre ediff causes this issue. It doesn't have to have a rear ediff, although that can also cause the problem. It is a known problem on Topix, especially for early L405 Range Rovers.

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My rear e-diff was replaced in November and the cluck went away. For while only, the clunk is back and if anything, worse than before as in the clunk is heard/felt more often. It is back at the dealer for further investigation, I've mentioned Bob's reference to similar issues with L405 Range Rovers. Fingers crossed they can locate the cause, as it doesn't appear to be the e-diff itself causing this.

Got the car back fixed, no clunks on the way back from the dealers. They carried out two oil changes on rear diff and transfer case, then ensured the car was on the latest RDCM and TCCM software versions, checked operational zero positions and did a RDCM and TCCM calibration.

Ron

So after almost 2 years the car was fixed yesterday. Apparently there's a second bulletin out for the issue. The first covers the flush and oil change and the second is about inspecting for worn parts.

After some argument JLR covered it under warranty.

No more clunks for now. Fingers crossed.