ryan125hst
Established Member
Does anyone know why bus transmissions seem so much noisier that automatic car transmissions?
Take this video as an example:
It whines loudly even when the bus is stationary. This whine seems typical of Voith gearboxes - I've certainly heard many buses making such a sound.
The retarder can also be heard when the bus is slowing down. This is something not found in cars however so more noise during braking is understandable.
And then there's this:
This Allison gearbox is making noises as it changes through the gears which are quite difficult to describe. I can only assume it's caused by the clutches and or breaks within the transmission being applied/released?
So why is this never heard on cars with automatic transmissions?
Take this video as an example:
It whines loudly even when the bus is stationary. This whine seems typical of Voith gearboxes - I've certainly heard many buses making such a sound.
The retarder can also be heard when the bus is slowing down. This is something not found in cars however so more noise during braking is understandable.
And then there's this:
This Allison gearbox is making noises as it changes through the gears which are quite difficult to describe. I can only assume it's caused by the clutches and or breaks within the transmission being applied/released?
So why is this never heard on cars with automatic transmissions?