Calculating ratio "i"
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2008 Audi S4, 2008 Audi RS 4, 2007 Audi S4, 2007 Audi RS 4, and 2006 Audi S4. However, it is still accessible from the selected car via links, so may be relevant.
Transmission ratio
| 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
= 45 |
ZA1
= 9 |
| Driven gear |
ZG2
= 35 |
ZA2
= 35 |
| Calculations: |
|
| iG |
= |
35 : 45 = 0.778 |
|
| iA |
= |
35 : 9 = 3.889 |
|
| iov |
= |
0.778 x 3.889 = 3.025 |