low cyclical humming noise at 70 mph. Any clues ??

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01-01-20, 09:10 PM

#16

BlckGhst

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I had a rhythmic vibration at highway speeds on my 2008 IS350. Never figured out what was causing it

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01-03-20, 06:24 AM

#17

2013FSport

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Anyone that has this, try just barely applying the brakes as this action will take the transmission torque converter out of lock up allowing the TC to slip a little. Another option is try a different gear but maintain the same speed. Does it repeat? It's likely dome resonance of the drive shaft. Does it go away above 75mph?

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01-10-20, 10:03 PM

#18

Eurofreak

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Quote:

Originally Posted by Eurofreak

Very old thread, I know, but did this ever get figured out? I got new tires and feel like I am also getting a low frequency rhythmic humming at 80mph that gets louder with speed.

Figured out my issue... bad rear wheel bearing.