It makes me nuts because I dont understand it.

 

Im an early riser and my palace of love is near the main street route to the port area. Plus I have a traffic light. So at 5am, when the gaily painted heavy trucks are taking off from the light its like weeeeeeeeeeeeeaaaaaaaaaaaawww as they run through the gears. My bud says its the turbo on the little engines they use but it doesnt sound like a turbo whine, it sounds like a tranny whine, or even a whine coming from the pumpkin. It sounds horrible and its not like its only once in a while, its from all the trucks.

 

My question is, why do they whine so loudly. Is is a mod for torque or something? Any motorheads know?

Edited December 4, 20196 yr by metisdead
Topic title corrected

Is the pumpkin being pulled by mice ?

If so you've got a Cinderella problem.

 

The noise is probably turbos spooling up and then maybe wastegates opening.

Edited December 4, 20196 yr by Docmartin

 To me it sounds like a Niezhov whine

Let's move this to the motor forum for the "experts" to pitch in ????

18 minutes ago, sirineou said:

 To me it sounds like a Niezhov whine

Spelled wrong ????

To avoid further confusion, topic title has been corrected to transmission so that others are not confused about whining by transvestites. 

There are a few trucks same up here in the sticks, pretty sure it is some sort of "device" that is supposed to sound like "turbo" it's not, pathetic kids playing with their toys?

11 minutes ago, CGW said:

There are a few trucks same up here in the sticks, pretty sure it is some sort of "device" that is supposed to sound like "turbo" it's not, pathetic kids playing with their toys?

I was wondering if its some kind of "noisemaker" because to me, If I was driving something and heard a noise like that Id pull over and stop driving. Especially coming out of a manual box on upshift.

Also curious, my AWD Celica also have pronouced tranny whining, thought it is cute, but puzzled where it came from? Definitely not wheel bearing had all new on 4 wheels.

 

Is it axle? Viscous coupling? LSD? Or just worn gears? Btw. this video car had a similar whine to mine( note 02:40 the car come to a stop ) : 

 

 

 

Edited December 4, 20196 yr by Coremouse

That sound is not the same, its more of a whoooooooooOOOOOOOOOOO

3 minutes ago, Nyezhov said:

That sound is not the same, its more of a whoooooooooOOOOOOOOOOO

I reckon you got that spot on! - well done ????

I think they are using something similar to these https://www.amazon.com/Turbo-Electronic-Simulator-Switch-Chevrolet/dp/B00QF84ZJ8

If they are diesel pickup trucks then it is the sound of the turbos spooling up. 

 

On newer trucks the sound is muted and can only be heard if the engine is being revved high. However, they can be modified to have bigger turbos and sound deadening within the engine compartment removed to increase the noise.

 

 

Yep. Sounds like a deep and loud turbo whistle. What for?

2 minutes ago, DeeMoney said:

If they are diesel pickup trucks then it is the sound of the turbos spooling up. 

 

On newer trucks the sound is muted and can only be heard if the engine is being revved high. However, they can be modified to have bigger turbos and sound deadening within the engine compartment removed to increase the noise.

 

 

Diesel big rigs not pickups. Usually the ornately painted ones.

The transmission whining makes me nuts!

 

Well, that's one question answered.

9 minutes ago, DeeMoney said:

On newer trucks the sound is muted and can only be heard if the engine is being revved high. However, they can be modified to have bigger turbos and sound deadening within the engine compartment removed to increase the noise.

Or you can put on an electronic gizmo to make it sound like you have a huge turbo! along with a couple of hundred rear view mirrors, some spotlights, a Michelin man or two, a very load noisy exhaust mod and some coloured wheel nut covers and you will be the envy of all - least if you are very small minded & think like a "man child" you will think so!

1 minute ago, CGW said:

Or you can put on an electronic gizmo to make it sound like you have a huge turbo! along with a couple of hundred rear view mirrors, some spotlights, a Michelin man or two, a very load noisy exhaust mod and some coloured wheel nut covers and you will be the envy of all - least if you are very small minded & think like a "man child" you will think so!

That's description is it !!!! although I never look askance at anyone's choice of customization, since I started with a baseball card clothespinned to the spokes of my Stingray bike!

The yellow air-con buses have a similar whine..very distinctive and it does cut through the normal roadway din, especially at night.  Luckily, most of the AC buses stop running after midnight.

It is indeed turbo whine, often coupled with outrageous modified exhausts, they are damned annoying.

Oh come on, give Somchai a break...he's the big hero for all the kids in his home-village.

9 minutes ago, Thian said:

Oh come on, give Somchai a break...he's the big hero for all the kids in his home-village.

The paint jobs are cool.

2 hours ago, Nyezhov said:

Spelled wrong ????

Spelt wrong????

 

Unlikely the transmission unless they have straight cut gears.

Compressor surge or turbo flutter caused by back pressure. Truckies here mess with the stock waste gate on their diesel engines to get that cool (to them) sound.

Most diesels don't have wastegates.  A lot of the older trucks have more open exhausts making turbo whistle more obvious when working.

 

Trucks do make a bit more gear whine than light vehicles due to more drive-train components (range change, power dividers between axles etc) and higher loads.  Gear whine is lower frequency that the turbo whistle. 

5 hours ago, Jitar said:

Most diesels don't have wastegates.  A lot of the older trucks have more open exhausts making turbo whistle more obvious when working.

There are no waste gates on large truck turbocharged diesel engines? So that loud, falling "Owwww..." as the driver takes the foot of the accelerator and up-shifts is coming through the modified exhaust systems? I've never heard the older 'long nosed' Isuzu's ever making that noise but just about every second newer cab-over one does.

It's a shame some posters choose to mock an OP with such serious problems. The man deserves our sympathy.