I have a 2011 Subaru Outback limited with CVT an just over 98,000 miles. At about 47 mph I am hearing a hum.

Asked by Jun 06, 2017 at 05:22 PM about the 2011 Subaru Outback 2.5i Limited

Question type: Maintenance & Repair

I have a 2011 Subaru Outback premium 2.5i with CVT and just over 98,000
miles.  Over the last 2 weeks I have noticed a hum when going about 45 mph.  
Is this a sign of transmission failure?

4 Answers

120,505

This would depend on where the hum is coming from and how loud it is. If the CVT is working OK then I would not worry but you should have the CVT fluid changed if you have not done so.

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If you're lucky it's either scalloped tires that you should rotate and rebalance to arrest this process...or a wheel bearing (probably rear) is wearing out...which is common. The former will hit you for $80, the latter about $200. I don't know if SOA will "participate" in a goodwill CVT change, and whether being on one side of 100k is meaningful in their decision process; so it may make sense to get your Subie up in the air and cruising along as a wrench with good hearing listens at all four corners for a noisy bearing (phew!) AND at the tranny for an emergent inner CVT bearing ($2000 used, $7k new!). A friend who runs a busy indie Subie store in CT is getting pissed at how many 2010-2012 CVTs he's having to replace. Sigh.... Good luck, and let me know what you find.

Thanks for your response. I hope to get my Subie in tomorrow so that we can know what is going on. It had occurred to us that perhaps it is a wheel bearing. The tranny seems to be working as it should, but it is good to check out before things get worse.

Thanks for you answer - I hope to get it in and find out what is going on.

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