6th gear noise at certain speeds?
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Theyre setting up a harmonic between them, you need to get rid of one.
Its definitely exhaust drone and not tire noise?
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I have the same thing. VIN 1871 , Build date 12/22.
Are we sure it's not just exhaust drone/resonance instead of a drive line thing?
Are we sure it's not just exhaust drone/resonance instead of a drive line thing?
2023 Onyx Black GRC (PP, CWP, TP) the original GRanola Armrest
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No because it’s speed based and exhaust wouldn’t by cyclic like this is
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I'm picking up what you're putting down, about it possibly being strictly speed based. My thoughts though were that, it could be load based, since the load at that same rpm range is different in every gear, with the highest load being in 6th... I also do not get the noise at the same speed in 5th gear, does everyone else?
Also I forgot to check exactly what rpm's it's turning in that speed range in 6th. Could it possibly be the center active exhaust flapper being close enough to the opening point that it's cycling or doing something weird? Again, just food for thought.
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Does yours have the noise?
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I'm going to capture a data snapshot with Techstream while it's happening when I get a chance.
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Give it a whirl in the am without cruise...it's definitely throttle/load dependent.
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Maybe unplug the exhaust valve to make sure it’s not that?
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Personally, I do not believe this is engine related, I believe it is drivetrain related. Based on experience with other similar noises in Toyota products, I think it's a shaft that's machined out of tolerance causing the noise to phase in and out at certain speeds, being shaft speed, not road speed.
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That's actually a great idea! Very quick and easy to do and would quickly confirm or deny. I personally don't think that's it, but it would be super quick easy. Now you're thinking like a technician. 😉
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Doesn't the car go into reduced power mode if you unplug this valve?
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I seem to recall reading somewhere here on the forum that somebody tried it and it did not cause an issue, but I haven't tried it personally.
2023 Onyx Black GRC (PP, CWP, TP) the original GRanola Armrest
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I’ve seen multiple people on the fb group say it has but I don’t believe it’s immediate and you hopefully would have time for one quick freeway drive to test
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In that case you think they botched something up with the drivetrain components and/or set ups?
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Remember that Toyota doesn't build every single component on the vehicle. They contract another reputable company to build large components for them. Toyota doesn't make wheels as an example, they buy them from another company. Likewise for things like transmission and transfer case. I haven't crawled under the car to look for any stamping or casting marks, but I would suspect that the drive line components are built by Aisan-Warner. Even the best of companies have a glitch in manufacturing once in awhile.
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