Volkswagen Workshop Service and Repair Manuals

Example:

i= Z2/ Z1 1)

iG = Gear ratio = ZG2: ZG1 = 31 : 37 = 0.838

iA = Axle ratio = ZA2 : ZA1 = 61 : 18 = 3.389

Overall ratio = total ratio
= iG x iA = 0.838 x 3.389 = 2.840

     1)     Z1 = No. of teeth drive gear, Z2 = No. of teeth driven gear