RPM Calculator
Popular Transmission Ratios - use for input below TRANSMISSION | 1ST | 2ND | 3RD | 4TH | 5TH | GM Muncie (M20) 66-74 | 2.52 | 1.88 | 1.46 | 1.00 | n/a | GM Muncie (M20) 63-65 | 2.56 | 1.91 | 1.48 | 1.00 | n/a | GM Muncie (M21/M22) | 2.20 | 1.64 | 1.28 | 1.00 | n/a | GM Powerglide | 1.76 | 1.00 | n/a | n/a | n/a | GM Turbo Hydra-Matic 350 | 2.52 | 1.52 | 1.00 | n/a | n/a | GM Turbo Hydra-Matic 400/4L80E | 2.48 | 1.48 | 1.00 | 0.78 | n/a | GM Turbo Hydra-Matic 2004R | 2.74 | 1.57 | 1.00 | 0.67 | n/a | GM Turbo Hydra-Matic 700-R4/4L60E | 3.06 | 1.63 | 1.00 | 0.70 | n/a | Tremec 3550/TKO | 3.27 | 1.98 | 1.34 | 1.00 | 0.68 | | |
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