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sprinkles08, ASE Certified Technician
Category: Car
Satisfied Customers: 21410
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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Hiace: I have 2011 Toyota Hiace, 3.0 liter diesel automatic,

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I have 2011 Toyota Hiace, 3.0 liter diesel automatic, bought brand new from Toyota in NZ, odometer 82500km, why when I drive around 100km/hours and up I feel noise and vibration but gone when I didn't press the accelerator. The noise and vibration like if your wheel hub have problem, but is not the wheel hub. I did just get alignment too from reputable workshop. My mechanic say its the diff gear, he change the diff oil with thicker one but the vibration and lower noise still there. How come a 2011 commercial van already have that kind of problem???So disappointing Toyota!

Hello and welcome to JustAnswer!


It sounds like you may have a bearing failure in the rear differential. If it were a gear noise then it would be described more as a whine, where a failed bearing or race would give a growl type noise.


There are a few ways that bearings can fail.


Preload can be too high. For instance if the pinion seal had been replaced and the nut was over torqued it would cause pinion preload to be too high and the bearings will fail.


Fluid contamination can cause bearing failure. If there was water in the fluid from going through a large puddle or something like that then it will cause failure of the bearings and eventually gears also.


Failure can happen from fluid degradation and lack of period maintenance.


It can also just be a failure of the bearing or race that is unpreventable.

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