Chevelle Transmission | El Camino Transmission
Transmission Ratio Drop From Gear to Gear
Sometimes selecting a transmission comes down to the drop between gears. This chart will show the percentage drop for 8 of GM's popular transmissions. The first column of each transmission shows the ratio for that particular gear while the second column of each transmission shows the percentage of drop for that gear from the previous.
Manual Transmissions - 4-speed | |||||||
M20 (64-65) | Percentage Drop | M20 66> | Percentage Drop | M21/M22 | |||
2.56 | 2.52 | 2.20 | |||||
1.91 | 25.39% | 1.88 | 25.40% | 1.64 | 25.45% | ||
1.48 | 22.51% | 1.46 | 22.64% | 1.28 | 21.95% | ||
1.00 | 32.43% | 1.00 | 31.51% | 1.00 | 21.88% | ||
Automatic Transmission - 2-speed, 3-speed | |||||||
Powerglide | Percentage Drop | TH350 | Percentage Drop | TH400 | Percentage Drop | ||
1.76 | 2.52 | 2.48 | |||||
1.00 | 43.18% | 1.52 | 39.68% | 1.48 | 40.32% | ||
1.00 | 34.21% | 1.00 | 32.43% | ||||
Automatic Transmission - 3-speed with overdrive | |||||||
200-4R | Percentage Drop | 700-R4 | Percentage Drop | 4L80E | |||
2.74 | 3.06 | 2.48 | |||||
1.57 | 42.70% | 1.63 | 46.73% | 1.48 | 40.32% | ||
1.00 | 36.31% | 1.00 | 38.63% | 1.00 | 32.43% | ||
0.67 | 33.00% | 0.70 | 30.00% | 0.75 | 25.00% | ||
Chevelle Transmission | El Camino Transmission