Gear Ratio Calculation

2012 Volkswagen Jetta TDI, 4D Wagon, Standard TransSECTION Gear Ratio Calculation
WARNING: This page is about a different car, the 2014 Volkswagen Jetta and 2013 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.

Example:

Β  7. Gear Final Drive
Drive gear ZG1 = 49 ZA1 = 17
Driven gear ZG2 = 32 ZA2 = 71

i = Z2 : Z1 (Z1 = Number of teeth on the drive gear, Z2 = number of teeth on the driven gear)

iG = gear ratio = ZG2 : ZG1 = 32 : 49 = 0.653

iA = axle ratio = ZA2 : ZA1 = 71 : 17 = 4.176

itotal = total ratio= iG x iA = 0.653 x 4.176 = 2.730

RENDER: 1.0x

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