I love my new '12 Yaris!!!

[CrankyOldMan]

Technically, any gear set with a ratio below 1:1 is an overdrive--the output shaft makes more revolutions than the input shaft. The stock 5th gear for the Yaris C50 is 0.815:1, and 4th is 0.969:1, so they're both classified as overdrive.

As far as road noise goes, it could be a combination of tires and aero, as well as some strategically placed padding/dampening material. Could we get the brand/model of your tires? Glad to hear that you're happy with the new Yaris!

[junorico24]

Originally Posted by CrankyOldMan

Technically, any gear set with a ratio below 1:1 is an overdrive--the output shaft makes more revolutions than the input shaft. The stock 5th gear for the Yaris C50 is 0.815:1, and 4th is 0.969:1, so they're both classified as overdrive.

As far as road noise goes, it could be a combination of tires and aero, as well as some strategically placed padding/dampening material. Could we get the brand/model of your tires? Glad to hear that you're happy with the new Yaris!

What is this aero, padding and dampening material?

[CanIHazYarisHatch?]

Originally Posted by junorico24

Wait! did you say she's quiet at highway speeds? How did they reduce the noise?

I love my 07 but she's loud on the highway. Congrats with your baby boo!

Lots of insulation and aerodynamic tweeks, I imagine.

Originally Posted by CrankyOldMan

Technically, any gear set with a ratio below 1:1 is an overdrive--the output shaft makes more revolutions than the input shaft. The stock 5th gear for the Yaris C50 is 0.815:1, and 4th is 0.969:1, so they're both classified as overdrive.

As far as road noise goes, it could be a combination of tires and aero, as well as some strategically placed padding/dampening material. Could we get the brand/model of your tires? Glad to hear that you're happy with the new Yaris!

Bridgestones, that's all I know. lol They are rated for "A" wear, and "A" speed on the sidewall. I looked at them yesterday when just looking over the car.

[CrankyOldMan]

Originally Posted by junorico24

What is this aero, padding and dampening material?

Sorry, I meant aerodynamics. Changing the air flow over the vehicle can dramatically reduce wind noise, if done right. Just think of what happens when you roll down your windows.