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2014 Forester CVT
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95 Posts
Has anyone been able to read the temp of their CVT fluid ?

The manual just shows its turns on the high temp light at 125 C (approx 257 degrees)
 

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2014 Forester CVT
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23 Posts
Discussion Starter #22
Torque convertor

I'm thinking it could be torque converter not locking up. Thats why I am getting less good fuel efficiency and a highger RPM.

I am not sure but I think it could be a problem there...


Thx
 

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Premium Member
2015 XC diesel CVT
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4,055 Posts
To answer a question...

I've been monitoring CVT temps for a bit. It takes a ONG tme to warm up, and never gets what I'd call hot.

eg. 10c ambient temp, tranny takes about 40 miles to come to a stable temperature somewhere around 55c. Gentle highway running will have it slowly drop back towards 50c, crawling in traffic might make it raise a degree or two as might a steep climb.

I've yet to find a situation where there's enough slippage to make much heat. Rock crawling or walking-pace traffic up a mountain pass maybe? Certainly the load would need to be sustained for quite a time and at high ambient temps...
 

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2014 Outback
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1 Posts
I've read the messages in this thread and have a few questions. I have a 2014 Subaru Outback Limited 2.5 and when driving in cold weather the RPM at 50 mph will often be as high as 3000 (continuous 50 mph on the flat). When I move it over to manual setting, it tells me it's in 3rd or 4th gear. Is this normal? The RPMs seem way too high and the engine sounds like it's straining. This has been going on for about a month. It doesn't happen every time I drive it. Feedback appreciated.
 

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Premium Member
2015 XC diesel CVT
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4,055 Posts
I'll add some temperature data here.

Playing with some corrugated board as a "winter front", I can confirm that the front-mount fluid cooler makes a large difference to peak temperatures but rather less to warmup speed.

As above, normal temperatures are 55c or so
Radiator grille closed off completely brings normal temps up to the mid-60s, and sustained hard highway use (80mph-ish) has temperatures into the low 70s.

But merely cutting a 3" hole in the closer just infront of the cooler, and temperatures again stabilise to 55c or so.
 

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Premium Member
2015 XC diesel CVT
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4,055 Posts
...and some more, now that it's cold. For the EU diesel of course but it might not differ that much.

If fluid temperature is <= 3c, the torque converter remains unlocked until fluid temp passes 10c.
 

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2014 Forester XT CVT w/ S & S#
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307 Posts
So maybe I dont drive long enough each day to see a good gas consommation. It will probably take longer than 25 miles to get the real good mpg of the car.
You would be correct ... if you only driving 16 km (10 miles) to work your car is just starting to get warm when you get to your destination (during very cold weather). You're not going to ever get good gas mileage.

As others have said, shifting manually and keeping RPM's low is counterproductive to getting your engine / transmission up to temperature; and going so is also lugging the system, which is not good in the long term.
 
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