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General repair instructions > < Transmission layout

A3 Mk2

Calculating ratio “i”
Calculating ratio “i”
Example:
   
 6th gearFinal drive
Drive gearZG1 = 34ZA1 = 22
Driven gearZG2 = 31ZA2 = 72

i = ZG2 : ZG1 → Note
iG = gear ratio = ZG2 : ZG1 = 31 : 34 = 0.912
iA = axle ratio = ZA2 : ZA1 = 72 : 22 = 3.273
iov = overall ratio = iG x iA = 0.912 x 3.273 = 2.985
1)  Z1 = No. of teeth on drive gear, Z2 = No. of teeth on driven gear
   

General repair instructions > < Transmission layout