A4 Mk2
|
Transmission ratio | = | No. of teeth on driven gear | : | No. of teeth on drive gear |
Ratios | Formula | ||
iG | = | Gear ratio | ZG2 : ZG1 |
iA | = | Axle ratio | ZA2 : ZA1 |
iov | = | Overall ratio | iG x iA |
Example: | ||
6th gear | Final drive | |
Drive gear | ZG1 = 38 | ZA1 = 8 |
Driven gear | ZG2 = 25 | ZA2 = 30 |
Calculations: | ||
iG | = | 25 : 38 = 0.658 |
iA | = | 30 : 8 = 3.750 |
iov | = | 0.658 x 3.750 = 2.467 |