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General repair instructions > < Transmission layout

A3 Mk2

Calculating ratio „i“
Calculating ratio „i“
Example:
   
 5th gearFinal drive
Drive gearZG1 = 39ZA1 = 18
Driven gearZG2 = 29ZA2 = 61

i = Z2 : Z1 → Remark
iG = gear ratio = ZG2 : ZG1 = 29 : 39 = 0.744
iA = axle ratio = ZA2 : ZA1 = 61 : 18 = 3.389
iov = overall ratio
iov = iG x iA = 0.744 x 3.389 = 2.520
1)  Z1 = No. of teeth on drive gear, Z2 = No. of teeth on driven gear
   

General repair instructions > < Transmission layout