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S80 '06-'16 / V70 & XC70 '07-'16 General Forum for the P3-platform S80 and 70-series models |
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Auot box - lifetime?Views : 1917 Replies : 31Users Viewing This Thread : |
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Sep 7th, 2018, 23:56 | #21 |
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Sep 8th, 2018, 10:31 | #22 |
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This topic crops up frequently and there is usually a debate about causing more damage if you replace all the old, dirty fluid with new. No-one on here has ever reporting encountering that.
In my mind it's like declining emergency heart bypass surgery because of the small chance you might have an allergic reaction to the anesthetic... Everyone who changes the oil reports improved gearbox "manners" afterwards, even if it doesn't fix all the pre-existing problems. Whilst the TCM adaptation memory should be reset (or even better the full adaptation process completed), it's not a huge problem if that is not done as it will mostly re-adapt over a short (500 miles?) time. Not resetting the TCM after a fluid change will not cause any new errors or messages directly. Although Volvo do not include trans fluid changes in their service schedule - they do recommend it every 36k for "arduous use" vehicles (taxi, towing, hot climate etc.) I think I would be correct in saying that the experienced Volvo dealer mechanics on here believe that many transmission failures could be avoided by changing the fluid at sensible intervals (say 50-70k for normal domestic use) and would change the fluid in their own cars. Other manufacturers that use the AW55 and TF80 in their models usually recommend fluid changes, the longest interval of which I think is Jaguar at 150k (this was latterly introduced after about 3 years of them launching the 2.2D X-Type auto which uses the TF80).
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Sep 8th, 2018, 12:23 | #23 |
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Having hunted far and wide before doing a sump dump on my S80, I can attest that it makes a big difference to how the gearbox behaves in general and that's after just one sump dump.
There are various schools of thought with changing the ATF and I think a lot of the horror stories come from power flushing transmissions that are already on death's door and power flushing them (thus dislodging all the gunge and it getting stuck somewhere)or the wrong ATF being used. If you want the super conservative approach, sump dumps let you mix old and new fluid, with the detergents in the new fluid being able to suspend some of the gunge without it just ending up forced somewhere. If your transmission is properly on death's door anyway, then a fluid change may be what kills it, but so will not doing anything. So you've nothing really to lose aside from some ATF. If you change it before you start having major problems, you're only really doing the car a favour. You'd change your oil. I'm looking at getting my next sump dump done in a couple of weeks, I've done a good few hundred miles since the last one which has let some of the new fluid work around and start doing good, and it'll be interesting to see the colour that emerges. |
Sep 8th, 2018, 17:53 | #24 | |
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Quote:
I've later had the valve body done (approx 20k later) and after a control module adaptation, it's mostly right with occasional clunks on downshift from 5-4 I believe. The best it's ever driven though. Finding quiet roads is proving difficult and I'd like to do it again. In hindsight I should have tried the control module adaptation before the valve body. I think anwother item not to be overlooked is the torque converter although not an expensive part (like the valve body), it involves removing the gearbox. Unsure of troubleshooting this part but I think a faulty one causes vibration or drag. Finally something I'm curious about is the torque mount on the gearbox and whether that could contribute to any poor or harsh shifting. |
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Sep 10th, 2018, 07:53 | #25 |
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This is the thing I have never understood with volvo. They recommend an engine oil change interval but say no need to change gearbox unless arduous duties undertaken. To reinforce the instruction they will releave you of £300+ if you ask them to change it.
Seriously if their gear box oil is so good why is their engine oil so poor. It of course is not, it's designed obsolescence, the gearbox will last the warranty period without oil change therefore volvo don't care. Less technically minded owners belive volvo and don't change it as it's not nessesary untill it is by which time the problems are already well developed. I have a manual and was met with blank stares when I asked for the gearbox oil to be changed at the dealers,in fact they could not give me a price for it as it was not on the pricing menu. We agreed on price of the oil and half hour labour, I have my doubts they actually changed it as the fitter whom did the job reckoned it took only a litre of oil and I know because I now change it myself it takes 2.2 litres. Premium car brand they may think they are, they evidently want us to buy many premium cars and then wreck them by lack of maintenance. Paul. |
Sep 10th, 2018, 09:14 | #26 | |
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Sep 10th, 2018, 13:51 | #27 |
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I'm now on 167,000 miles on the original box. It's still perfect.
I do the annual change as per my thread here https://www.volvoforums.org.uk/showthread.php?t=160569 Just about to do it again. I used to buy JWS3309 from Opie Oils (about £13/litre), but this time, I was ordering some stuff from FRF, so bought a 4-litre of genuine Volvo (Part # 1161640) from them as a better price!!!
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Sep 10th, 2018, 15:55 | #28 | |
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£13 a litre. Good grief man, they saw you coming! Can I sell you something please!!! |
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Sep 11th, 2018, 16:56 | #29 |
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Yes - seems to have dropped in price a bit - about £11/litre delivered on ebay now
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Sep 11th, 2018, 21:26 | #30 |
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