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2014 Volvo XC90 transmission leak, burning oil, and anti-skid

A mid-size luxury crossover SUV, the Volvo XC90 made its debut in 2002 at the Detroit Motor Show. Recognized for its safety, practicality, and comfort, the XC90 is a popular vehicle around the world. The XC90 proved to be very popular, and very good for Volvo's sales numbers, since its introduction in model year 2003 (North America).
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2014 Volvo XC90 transmission leak, burning oil, and anti-skid

Post by 1997volvo850 »

Over the last two 10k maintenance periods we've had to add oil to our 2014 Volvo XC90. From 70-80k we added a quart after oil light came on (first time) and from 80-90k we added 1qt after a long drive plus another 2qts a month or so later. Vehicle is on regular Volvo maintenance and was serviced at 80k and 90k.

The Volvo dealer now tells me these engines are known to get clogged up rings and tend to burn oil. But at that time (90k) I asked them to check for oil leak and they said there was too much oil on engine to locate leak. They cleaned engine and I brought it back in two weeks.

It turns out the seal on my transmission oil pan is leaking. This was source of oil. I was told this is not a traditional seal but is known to fail on these vehicles. Now the shock (to me). To fix transmission oil pan seal will cost over $2500! It sounds like they need to remove transmission and take engine off its mounts to get at this seal to replace it. Does this sounds reasonable?

This does not address the issue of the XC90 burning oil. They recommended additives to help clean the gunk off of the rings. Any specific recommendations for additives?

And of course the anit-skid light came on recently. That's $750 to fix. I'm beginning to wonder if the XC90 was designed by and for Volvo service departments. How long can I hold off fixing the anti-skid issue? The light comes on once and a while at this point. Some times stay on for a bit. Not sure what resets mechanism. Was off during last two 70 mile drives I took.

Any help is appreciated. My concern is that if I'm fixing these at 90K will I be fixing them again at 150K? 180K? Are these failures due to poor design?

Thanks in advance.

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Post by SuperHerman »

Three issues: 1) Burning Oil; 2) Leaking transmission; and 3) Anti-skid.

1) Regarding the burning oil - your engine has a pretty good record. Gummed up rings, usually the oil scrapper/control ring, is not uncommon in cars. It is usually a result of poor maintenance or oil change intervals that are just too long. Using an additional solvent and changing oil more frequently has been known to solve the problem. Sometimes. Do some searching and you will see Honda, Toyota, GM and many others suffering the issue. Read more and you will see people using various cleaners. Pick your poison here as the results vary. My brother had a Camry with the issue and got his oil consumption under control using SeaFoam in the oil and changing the oil every 2,000 miles. It was not immediate, but he had success.

Some car makers have the issue and have come up with a solvent that is added into the spark plug or injected into the engine.

2) The transmission seal leak. Your car has the AWTF-80 SC transmission which has a pretty good reputation. Personally I am not familiar with the transmission in your car, but if access is limited and the engine or transmission has to come out - it has to be done. Can you provide more details as to what exactly is leaking - that will tell you whether the transmission has to come out. If the leak is inside the bell housing by the torque converter that could be a fluke seal or you may have a problem internally causing excess play which is taking out a seal. If the leak is the valve body housing, that is not so worrisome, and I wonder if it can be accessed by tilting the engine (this is how it is done on my 2004 XC90 which has a different transmission). Have you shopped transmission shops? If you look up your transmission in Wikipedia you will see a large number of cars that use it. So it is not a Volvo only unit. Provide more detail and I can see what VIDA says (the official Volvo shop manual).

3) Anti-skid. This can be all sorts of things - do you have any codes?

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Post by ggleavitt »

PDF link for 3.2 oil consumption (TJ24643) in subpost #8- https://forums.swedespeed.com/showthrea ... mption-Fix as another reference point.

Lots of variations on the TF-80SC out in the world- https://en.wikipedia.org/wiki/AWTF-80_SC, have never read about a pan leak before and I peruse these posts pretty regularly but it's certainly possible. Sure it's not a valve body gasket that's leaking?
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Post by xHeart »

We have 2013 XC90, and loving the 3.2 feel.
What oil is being used? Check the filler cap seal.
An overfilled transmission fluid will boil over and leak. Check level when hot.
How is tire pressure and tread depth?
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Post by oragex »

I would start by moving away from that dealership for an independent speacialist garage or another dealership

As mentioned, good chance is the pcv box located on top of the engine. However, when running for a while like this the piston rings can also get damaged

As for the transmission, its suspicious. Id get a second opinion see if it really leaks.

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