Home > General > Diff factory recall what a joke |
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dan_uk_1984 Member Since: 12 Nov 2008 Location: Bude, Cornwall Posts: 4014 |
If the car has got to 84K then it would have failed by now...
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3rd Jul 2011 1:04pm |
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ric355 Member Since: 02 May 2011 Location: Surrey, UK Posts: 302 |
I'm don't agree with this. The issue with the propshaft is that it is sometimes not very accurately aligned when assembled in the factory. On a badly aligned shaft the splines begin to wear at the diff end and eventually they give up altogether. The rate of wear will be dependent on the amount of misalignment. So if there is only very slight misalignment then it could still go pop but it might not do so until 85k. Similarly, if someone has their propshaft or diff taken out for other reasons it could be put back together less accurately and could similarly go pop after a period. In my opinion, if there is a recall it has been done for a good reason and it needs to be carried out. |
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3rd Jul 2011 4:16pm |
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dan_uk_1984 Member Since: 12 Nov 2008 Location: Bude, Cornwall Posts: 4014 |
I've never heard of a diff blowing at that mileage - of course that doesn't mean to say one never has... but to do 84,000 miles with a misaligned diff would be a miracle. The ones that left the factory weren't "massively" out in the first place and obviously as the splines have to line up there are only X number of ways to locate the shaft.
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3rd Jul 2011 4:33pm |
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ric355 Member Since: 02 May 2011 Location: Surrey, UK Posts: 302 |
I'm not sure what you mean by "1 or 2 splines out". As I understand it the issue is one of alignment i.e. positioning of the centre differential relative to the front one, thereby causing the splines to engage at a slight angle. There is a CV joint on the rear of the propshaft near the centre diff, but not on the front. The modification inserts a CV at the front end of the propshaft thus allowing for some misalignment. By extension of your second theory with regard to recalls, LR obviously don't think they can get away without doing this one. I reckon that tells us something... |
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3rd Jul 2011 6:27pm |
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dan_uk_1984 Member Since: 12 Nov 2008 Location: Bude, Cornwall Posts: 4014 |
Correct, but if you ensure there is no misalignment in the first place then you don't need the flexible coupling. When this system is used in BMW's there is no need for this, the problem stems from Land Rovers "Slap Dash" build approach. It's not fair of me to tar every LR build line employee with the same brush, after all there are thousands of RR's out there who's Diff's have not failed and who are on their second owner (so know nothing about the recall) Land Rover have acknowledged that the bulk of failures were at 30-40K then in another 30-40K after replacement (before the flexible flange) |
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3rd Jul 2011 7:27pm |
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ric355 Member Since: 02 May 2011 Location: Surrey, UK Posts: 302 |
I don't really see it as a build quality issue. I see it as a design fault. As you know they changed the design for the later cars. |
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3rd Jul 2011 8:12pm |
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dan_uk_1984 Member Since: 12 Nov 2008 Location: Bude, Cornwall Posts: 4014 |
It had a different engine & gearbox... The LR bulletin says that the problem occurs from being misaligned on the production line. Simples. On the BMW X5 that uses the same drivetrain this doesn't happen. Simples. |
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3rd Jul 2011 8:36pm |
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ric355 Member Since: 02 May 2011 Location: Surrey, UK Posts: 302 |
That doesn't matter - the gearbox output shaft connects to the transfer box which transmits power to the front and rear propshafts via the centre differential. The only connection between the engine and the front differential is that they are bolted together at the sump. So the design of the front diff/prop wouldn't need to change if the engine and box was changed other than to address the mounting points.
I still think the apparent "risk" of having some other knock on problem is worthwhile. Perhaps by now they've done so many of them that there's less chance of a cock-up? ! |
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3rd Jul 2011 9:02pm |
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Japseroony Member Since: 18 Nov 2008 Location: North East Posts: 371 |
Hi Guys,
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5th Jul 2011 6:53pm |
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bob.lydon Member Since: 25 Apr 2011 Location: wallsend Posts: 36 |
Both of my range rovers had the diff recall done by strastone Newcastle, they collected the cars, valeted them, and returned them the next day.
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8th Jul 2011 1:22pm |
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