Quote:
Originally Posted by Jake1222
2019 4runner, less than 20,000 miles. Alright so here’s the details:
I had a Toytec suspension kit and BFG Ko2 285/70/17 tires installed on my truck the other day, and I noticed this strange sound after driving off. I would describe the sound as sounding somewhat like an airplane, or perhaps a humming sound. It only begins above roughly 25mph and you can also hear it when decelerating. No change in the noise when turning, and I highly doubt the wheel bearings are an issue whatsoever. So this leads me to believe it’s just tire noise.
Has anyone ever experienced anything similar? Is this normal tire noise or perhaps a balancing issue? Any other ideas?
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Does the sound go away if you put it in 4WD while going straight at those speeds? if so, it's front diff needle bearings.
My '19 had that and it was the needle bearings of the front diff assembly and I also thought it was the tires for some time. Super common for the needle bearing to make noise, particularly after a lift. Some get noisy right away and others take a while.
ECGS sells a bushing that replaces the bearing. I had a local shop install it for a couple hundred bucks and I never have to worry about another needle bearing making noise.