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Table 10 Gear ratios, interval of gear ratio and transmission efficiency of the novel AT mechanism (4)

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