Home > General > Gearbox longevity? |
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dan_uk_1984 Member Since: 12 Nov 2008 Location: Bude, Cornwall Posts: 4014 |
I suggest that you don't take your car to those "Mechanics" to suggest that the gearboxes fail at 90K is a load of tosh.
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10th May 2011 9:38pm |
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DeltaC Member Since: 22 Mar 2010 Location: Aberdeenshire Posts: 148 |
I changed my gearbox oil at 82k miles, and the diffs and engine. The gearbox then completely expired at 99,950 miles... |
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10th May 2011 9:44pm |
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netsonic Steve Member Since: 06 Oct 2010 Location: Sussex Posts: 165 |
Hi, I own a 02/03 TD6 Vogue and had my gearbox rebuilt in February this year with a shade over 94K on the clock. The guys at JT automatics did a great job and specialise in rebuilding failed auto transmissions and have done 100's of L322 RR, they also said .....“its defiantly a when not an if”..... to a trans fail on this vehicle.
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10th May 2011 9:55pm |
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barneyandbarbara Member Since: 21 Mar 2011 Location: Belfast Posts: 4 |
Thanks for the detailed replies! Great forum! If you don't mind, I have a few more questions:
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10th May 2011 10:22pm |
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dan_uk_1984 Member Since: 12 Nov 2008 Location: Bude, Cornwall Posts: 4014 |
I can only advise you on what I paid for comparison:
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10th May 2011 10:55pm |
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netsonic Steve Member Since: 06 Oct 2010 Location: Sussex Posts: 165 |
Ok, personal view...........don’t bother with a gearbox oil change unless you are sure its been changed at regular intervals from new.........by the time you get a RR with 70-80K on the clock that has not had a change of oil doing it now won’t stop the inevitable and can be expensive, filter kit £50-£60, plus oil which can be up to £29 a litre depending on where you go + labour cost if you don’t do it yourself, and the ZF box needs 9.9 litres from dry and 6 litres for a refill, most independent garages can’t get all the old oil out so you end up with the new oil being quickly contaminated, again little point in my view.........
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10th May 2011 11:05pm |
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dan_uk_1984 Member Since: 12 Nov 2008 Location: Bude, Cornwall Posts: 4014 |
Do you use the same theory for your engine oil? The gearbox is a mechanical device, and as such needs servicing. The manufacturer's service schedule for these boxes is 60,000 miles, it's as simple as that really! |
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10th May 2011 11:08pm |
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pretlove Member Since: 10 Feb 2011 Location: Bas vegas Posts: 1865 |
dan my range rover has done 72,000 would you say changing the gearbox oil / filter is worth while ...it all drives well and touch wood i dont seem to be having any of the issues others are having....its just i was all up for changing it but the tech from LR said that it might create problems changing it.....i cant see how it could so your advise would be great ...thanks in advance "RANGEISM WILL NOT BE TOLERATED"
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11th May 2011 12:09am |
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Rob2529 Member Since: 22 Nov 2010 Location: Wirral, uk Posts: 1470 |
Pert
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11th May 2011 7:39am |
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dan_uk_1984 Member Since: 12 Nov 2008 Location: Bude, Cornwall Posts: 4014 |
+1 The GM box has a lower service interval than the ZF, so when people say their TD6 box has failed at 90K, it's really no surprise if it's not been serviced. Add into the mix that the diesels are often used for towing etc and have a generally harder life with a lot more gear changes due to the low rev power it's no wonder they fail. Is it because they are built badly? Or is it because the manufacturer says the oil must be changed at 50K yet they are driven to 100K on dirty/ineffective oil. BMW/Land Rover do not care if you gearbox fails after 100K because you will be out of warranty by then. If you need to bring your car back for a new box then all the better for them. |
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11th May 2011 9:18am |
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dan_uk_1984 Member Since: 12 Nov 2008 Location: Bude, Cornwall Posts: 4014 |
Yes - if you'd like it to continue to work well. |
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11th May 2011 9:19am |
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elpeede Member Since: 09 Mar 2010 Location: Staffordshire Posts: 713 |
I do agree that the GM seems prone to wear quicker , having had one and chatted with the specialist who had 3 other FFRR's in that same week! He said the castings for the GM were from a material that wasn't quite up to the job at the time which has apparently been acknowledged buy the gearbox producer but too late for recalls / warrantee work. The internals of an autobox oscillate at a fast rate, add poor materials for castings and invetitable fragments from wear in the box floating around and the fluid will effectively become a grinding paste effectively over tiime.
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11th May 2011 10:32am |
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letsavit2 Member Since: 16 Oct 2010 Location: essex Posts: 854 |
i'm still undecided.
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11th May 2011 3:16pm |
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dan_uk_1984 Member Since: 12 Nov 2008 Location: Bude, Cornwall Posts: 4014 |
However, how many gearboxes that have failed HAVE had an oil change at the manufacturer specified time? I would bet None. Therefore although it is likely there were other factors that lead to their demise it is impossible to say that without a decent control that changing the oil would not have prevented failure which is the way this conversation seems to be going. |
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11th May 2011 3:39pm |
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