Trying to revive an old thread - does anyone have an update?
I took the vehicle to a couple of dealerships and of course, they said couldn't find any noises on the vehicle up to 70mph. They can't go higher than 70 mph since the technicians are not allowed to speed in a customer vehicle. They have a completely valid point but I still found it to be a very lame excuse. I have looked at multiple vehicle forums to at least get a clue to which part this noise may be related to but haven't gotten anything.
It definitely seems like a transmission whine as this happens only in the 6th gear. Can it be a bad bearing? Does a manual transmission have a fluid pump like the automatic transmissions - could this be the source of the noise?
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Falcon - what did you apply to reduce the noise?
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sobrz - Did you find anything that has helped you with the noise?