Workshop Manuals Factory service & repair SEAT
SEAT Leon Mk101 · Power transmission
01 · Transmission

Calculation of the gear ratio ?i? (02J 5-speed manual gearbox)

Make
SEAT
Model
Leon Mk1
Section
02J 5-speed manual gearbox › Technical data › Calculation of the gear ratio ?i?
Power transmissionCalculation of the gear ratio ?i?
Calculation of the gear ratio “i”
The gear ratio is obtained by dividing the number of teeth on the driven gear by the number of teeth on the driving gear.
Example:
   
 5th gearDifferential
Driving sprocket (primary)45 (Z1 Primary)19 (Z1 Gear)
Driven sprocket (secondary)34 (Z2 Secondary)60 (Z2 Crown)

i = Z2 : Z1
In this way we can find out:
iG = Gear ratio of a gear
iG =
Z2 Secondary
Z1 Primary
=
34
45
= 0.756
iA = Gear ratio of the differential
iA =
Z2 Crown
Z1 Gear
=
60
19
= 3.158
itotal = Total gear ratio
Is obtained by multiplying the gear ratios of the longest gear and the differential.
itotal = iG x iA = 0.756 x 3.158 = 2.387
   

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