[T3] Moaning in and out of gear

[Daniel Nohejl]

Yes, changed the muffler yesterday and it has no bearing on the sound. Are you sure you don’t hear anything? I have tinnitus in both hears and some moderate hearing loss and it’s as plain as day to me. Try earbuds or something?

A bit more info……when standing behind the car, I can hear the noise when Jessica revs the motor to the rpm the noise emerges at. When I open the hatch, I hear it less, and when I open the engine cover I can barely hear it at all but I can feel vibration/pulsing in the fan housing in synch with the noise. So the full experience of the noise requires everything to be buttoned up so that it can resonate more fully under the cover and in the rear of the car.

So it would seem to be the fan. It was welded and balanced. My understanding is that the fan is something of a harmonic balancer so perhaps the welding changes how it resonates? Not only were the individual blades welded but the center of the fan was tack welded to the larger outer fan. Am I on to something? If not the fan, perhaps the housing?

I have some recollection of hearing the noise months ago but kind of forgot about it until recently but, again, I can’t tell if that’s because it’s worse or I’m just tuned into it more. 



> On Jun 27, 2016, at 8:02 PM, William J <catnine09 at dslextreme.com> wrote:
> 
> Did you change the muffler yet? I really could not hear anything on the video's.
> ----- Original Message ----- From: "Daniel Nohejl" <d.nohejl at gmail.com>
> To: <type3 at vwtype3.org>
> Sent: Monday, June 27, 2016 2:25 PM
> Subject: [T3] Moaning in and out of gear
> 
> 
>> So I’ve either recently developed or only recently became attuned to an irritating moaning noise coming from the back of the car under the engine lid or thereabouts. It’s a relatively low pitched moaning wuh-wuh-wuh-wuh sound that appears at the following points whether accelerating or decelerating. Because of the speeds it occurs at, driving in traffic has become really annoying:
>> 
>> 12-15mph in 1st
>> 20-23mph in 2nd
>> 30-35mph in 3rd
>> 
>> It sounds for the life of me like wheel bearings but there are two things ruling them out. I’m confused b/c it seems that #1 would indicate the transmission and #2 indicates the motor, possibly the fan?
>> 
>> 1. if the sound is occurring and I immediately shift into neutral, the sound goes away
>> 
>> 2. i can reproduce the sound in neutral by revving the motor to a certain rpm
>> 
>> Here’s what it sounds like b/w 20 and 23 in 2nd. You need to either be close to your computer speakers or wearing headphones. It might be hard to pick up the sound at first, but once you do, it’s unmistakeable:
>> 
>> https://www.youtube.com/watch?v=oq6p3Tqm9i4 <https://www.youtube.com/watch?v=oq6p3Tqm9i4>
>> 
>> And here’s a really brief clip with the trans in 3rd….you can hear it disappear as we accelerate
>> 
>> https://www.youtube.com/watch?v=nIo2mSKabLk <https://www.youtube.com/watch?v=nIo2mSKabLk>
>> 
>> Ahead of a big cross country trip starting next week, I’m a bit nervous and having been burned so many times, I fear something grave is wrong. I’ll go poking around and whatnot, but I wonder if this sound rings any bells.
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