RPM Calculator

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Popular Transmission Ratios - use for input below
TRANSMISSION1ST2ND3RD4TH5TH
GM Muncie (M20) 66-742.521.881.461.00n/a
GM Muncie (M20) 63-652.561.911.481.00n/a
GM Muncie (M21/M22)2.201.641.281.00n/a
GM Powerglide1.761.00n/an/an/a
GM Turbo Hydra-Matic 3502.521.521.00n/an/a
GM Turbo Hydra-Matic 400/4L80E2.481.481.000.78n/a
GM Turbo Hydra-Matic 2004R2.741.571.000.67n/a
GM Turbo Hydra-Matic 700-R4/4L60E3.061.631.000.70n/a
Tremec 3550/TKO3.271.981.341.000.68
File Photo

Speedo Gears Link - Team Chevelle  


Input - Note: Currently set for my personal trans (TH350) and rear tire combination.
1st gear ratio: 3rd gear ratio: 5th gear ratio:
2nd gear ratio: 4th gear ratio: 6th gear ratio:
Tire: x x
Rear axle ratio: Speed (mph):

1st gear RPM is: 3rd gear RPM is: 5th gear RPM is:
2nd gear RPM is: 4th gear RPM is: 6th gear RPM is:

Input - Second set for comparison using 700R4 specs
1st gear ratio: 3rd gear ratio: 5th gear ratio:
2nd gear ratio: 4th gear ratio: 6th gear ratio:
Tire: x x
Rear axle ratio: Speed (mph):

1st gear RPM is: 3rd gear RPM is: 5th gear RPM is:
2nd gear RPM is: 4th gear RPM is: 6th gear RPM is: