Whirring noise in rear end, 2011 Sienna AWD
Morning everyone. I have lurked here for a while, but since I have had little issues with my 2011 Sienna XLE AWD have not had much of a reason to post.
Well that has changed, a bit. Now have roughly 52,000 miles on it, with regular maintenance per manf instructions (actually change out the oil a bit more frequently than 10K because that freaks me out a bit.)
Starting over the weekend my husband noticed a whirring noise while driving that is louder in the rear. It sounds like a wind up toy... It is somewhat variable with speed, and is only there while moving. The noise is the loudest between 35-50 mph, but probably there at higher speeds, just drowned out by the highway noise.
I have not seen a decrease in my MPG, and no noticeable pulling in the wheel or change in responsiveness. Breaks seem fine, not spongey or making any noise (although they are original). I have done the old feel the wheels for heat and all four seem about the same, no hot wheel that I can find. Also no smell...
So I am starting out with my trusted garage first, I want to rule out breaks or wheel bearing. But if those check out clean, I am afraid I will be going to the dealer to have the rear AWD unit checked.
Anyone else have an issue with this? It was perfectly silent up till about two days ago... right around 52,000K... Please share if you have!
I have it at the garage now, and will post updates in case someone else finds this helpful.