Calculating ratio "i"
WARNING: This page is about a different car, the 2008 Audi A4, 2007 Audi A4, 2006 Audi A4, and 2005 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 |
| 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 |