Calculating transmission ratios "i"
WARNING: This page is about a different car, the 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. 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 |
| itotal |
= |
Overall ratio |
iG x iA |
| Example: |
|
| |
5th gear |
Final drive |
| Drive gear |
ZG1 = 37 |
ZA1 = 9 |
| Driven gear |
ZG2 = 31 |
ZA2 = 35 |
| Calculations: |
|
| iG |
= |
31 : 37 = 0.838 |
|
| iA |
= |
35 : 9 = 3.889 |
|
| itotal |
= |
0.838 x 3.889 = 3.259 |