Overall Transmission Ratio I, Calculating
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2010 Volkswagen Jetta, 2009 Volkswagen Jetta, 2008 Volkswagen Jetta, 2007 Volkswagen Jetta, and 2006 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
Example:
| 5th Gear | Final Drive | |
|---|---|---|
| Drive gear | ZG1 = 39 | ZA1 = 18 |
| Driven gear | ZG2 = 29 | ZA2 = 61 |
i = Z2 : Z1*
iG = gear ratio = ZG2 : ZG1 = 29: 39= 0.744
iA = axle ratio = ZA2 : ZA1 = 61 : 18 = 3.389
itotal = total ratio = iG x iA = 0.744 x 3.389 = 2.521
- * Z1 = number of teeth on the drive gear, Z2 = number of teeth on the driven gear