Transmission Gear Ratio Calculation

WARNING: This page is about a different car, the 2013 Volkswagen Beetle and 2012 Volkswagen Beetle. However, it is still accessible from the selected car via links, so may be relevant.

Example:

-	5th Gear	Final Drive
Drive gear	ZG₁ = 46	ZA₁ = 24
Driven gear	ZG₂ = 33	ZA₂ = 70

i = ZG₂ : ZG₁ 1

i_G = gear ratio = ZG₂ : ZG₁ = 33 : 46 = 0.717

i_A = axle ratio= ZA₂ : ZA₁ = 70 : 24= 2.917

i_total = total ratio= i_G x i_A = 0.717 x 2.917 = 2.091

Z₁ = Number of teeth on the drive gear, Z₂ = Number of teeth on the driven gear