From: Configuration Synthesis and Performance Analysis of 9-Speed Automatic Transmissions
Gear | Gear ratio | Interval of gear ratio | Transmission efficiency |
---|---|---|---|
Reverse gear | − 9.67 | ‒ | 0.8774 |
1st gear | 4.68 | ‒ | 0.8731 |
2nd gear | 2.8 | 1.67 | 0.9807 |
3rd gear | 2.28 | 1.23 | 0.9350 |
4th gear | 1.78 | 1.28 | 0.9655 |
5th gear | 1.61 | 1.11 | 0.9695 |
6th gear | 1 | 1.61 | 1 |
7th gear | 0.6 | 1.67 | 0.9603 |
8th gear | 0.57 | 1.05 | 0.9595 |
9th gear | 0.5 | 1.14 | 0.9494 |