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Table 13 The gear ratios, interval of gear ratio and transmission efficiency of GM 9T50E

From: Configuration Synthesis and Performance Analysis of 9-Speed Automatic Transmissions

Gear Gear ratio Interval of gear ratio Transmission efficiency
Reverse gear − 2.96   0.9700
1st gear 4.69   0.9702
2nd gear 3.31 1.42 0.9803
3rd gear 3.01 1.1 0.9665
4th gear 2.45 1.23 0.9703
5th gear 1.92 1.27 0.9766
6th gear 1.45 1.33 0.9907
7th gear 1 1.45 1
8th gear 0.75 1.34 0.9922
9th gear 0.62 1.21 0.9884