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Volkswagen Polo Workshop Service and Repair Manuals

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General repair instructions > < Gearbox layout

Calculating gearbox ratio 'i' for Polo Mk4's 5-speed manual gearbox

Calculating gearbox ratio “i”
Calculating gearbox ratio “i”
Example:
   
 5th gearTransmission to the shaft
drive gearZG1 = 34ZA1 = 18
driven gearZG2 = 45ZA2 = 60

i = Z2 : Z1 → Note
iG = gear ratio = ZG2 : ZG1 = 34 45 = 0.756
iA = Differential gearbox ratio = ZA2 : ZA1 = 60 18 = 3.389
itotal = Total gearbox ratio = iG x iA = 0.756 x 3.389 = 2.562
1)  Z1 = No. of teeth of driving gear, Z2 = No. of teeth of driven gear
   

General repair instructions > < Gearbox layout