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General repair instructions > < Transmission layout

A3 Mk2

Calculating ratio „i“
Calculating ratio „i“
Example:
   
 6th gearFinal drive
Drive gearZG1 = 38ZA1 = 17
Driven gearZG2 = 31ZA2 = 62

i = Z2 : Z1 → Remark
iG = gear ratio = ZG2 : ZG1 = 31 : 38 = 0.816
iA = axle ratio = ZA2 : ZA1 = 62 : 17 = 3.647
iov = overall ratio
iov = iG x iA = 0.816 x 3.647 = 2.975
1)  Z1 = No. of teeth on drive gear, Z2 = No. of teeth on driven gear
   

General repair instructions > < Transmission layout