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Old 05-16-2012, 08:30 PM #1
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whining sound
I've got myself a 98 limited.
184,000 km
3.4
automatic tranny

I've been searching and reading as much as I can, but haven't come up with a clear answer yet. So I thought I would make a post.

The sounds seems to be coming from the tranny/diff area.
It occurs after it warms up a bit and happens in gear or neutral. In 4x4 or 2x4.
I haven't noticed any performance issues at all.

I just got and have only put less than 1,000 km on it.

My first thought is to drain and fill and see what happens.

Any thoughts?

Thank you
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Old 05-16-2012, 09:05 PM #2
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I've heard some speed related whining sounds in different 4Runner's over the years. From what I can tell, it's usually a pinion bearing.
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Old 05-16-2012, 11:08 PM #3
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Sounds like the Torque Converter. I have a whining sound too but only in 1st gear due to my planetary gear. I asked a similar question on the board a while back and found out it wasn't my torque converter cuz, it didnt make noise while in neutral or in any other gear except 1st during acceleration.
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Old 05-17-2012, 12:48 AM #4
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could be your diff as well and you can be "feeling" it through the driveshaft.
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