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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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07-29-2020, 07:15 PM | #1 |
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Highway Speed Drone - it's not tire noise
I've had this issue for 6 months, and even tho I am driving less I can tell that it is getting worse. I found this thread that describes it perfectly, but I've been unable to revive it:
https://www.ft86club.com/forums/showthread.php?t=134887 TL;DR of the thread is that him and I are getting a consistent drone that sounds like its coming from the center of the car from about 50mph and above. Any ideas? Troubleshooting steps? |
07-29-2020, 07:35 PM | #2 |
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Maybe tell us more about modifications to your car?
What makes you so sure it's not the tires? Have you had your wheel bearings checked? Do you have an exhaust leak that's progressively getting worse? |
07-29-2020, 07:43 PM | #3 |
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Car is stock except for 18" wheels that are about a year old. The noise is the same regardless of pavement type which makes me think its not the tire noise. Also, I don't hear it reverberating off of jersey barriers or cars in traffic. Would wheel bearings would be audible that way as well?
Good thought on the exhaust leak, as this is somewhat recent from the install of a new clutch by a local tuner shop. I will say it is directly tied to the speed and not the RPMs |
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07-30-2020, 03:27 PM | #4 |
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30ish offset wheels? and 18x8? 8.5"? 9"?
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07-31-2020, 06:53 AM | #5 |
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If you replaced one wheel bearing already you might consider doing the other side. Have you tried the "wheel bearing test" side-to-side movement aka putting load on one side of the car and switching to the other to see if it gets better or worse?
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07-31-2020, 10:10 AM | #6 | |
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Quote:
OP, check your drive shaft. Could be the carrier bearing at the center.
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08-04-2020, 05:02 PM | #7 |
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Thanks for the suggestions all! Heard back in PM from the original poster - he said it just ended up going away on it's own...now I remember why I switched from VW to Subaru+Toyota haha
Wheels are 18x8 45 offset on 225/40 Potenza AS Haven't noticed the noise change during load shifts, and also haven't had to replace any wheel bearings. From my perspective (and passengers') it does sound like its coming from the center of the car. Going to find time to get get it lifted in my friends garage so we can inspect the driveshaft. Will let y'all know - thanks again! |
08-09-2020, 11:10 PM | #8 |
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In descending order of probability
wheel bearing driveshaft support bearing
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09-01-2020, 05:49 PM | #9 | |
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Took the front wheels/rotors off and those suckers are RUSTED in there. Haven't tried the backs (didn't have the axle nut or new hubs) but we spent a good 8 hours trying everything; pry bars, mini sledge, +torch, slide hammer and a whole can of PB Blaster. Don't have access to any air tools, so looks like this is going to have to go to a shop to get figured out |
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09-03-2020, 11:46 AM | #10 | |
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09-03-2020, 01:13 PM | #11 |
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What kind of exhaust are you running
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09-06-2020, 07:11 PM | #12 | |
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