Stock Transmission Ratios |
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|---|---|---|---|---|---|---|
| Application | 1st | 2nd | 3rd | 4th | 5th | 6th |
| 74-76 RX2, 3, 4, Cosmo, P/U | 3.683 | 2.263 | 1.397 | 1.00 | .862 | |
| 77-78 RX3SP, 4, Cosmo | 3.380 | 2.002 | 1.390 | 1.00 | .791 | |
| 79-80 RX7 | 3.674 | 2.217 | 1.432 | 1.00 | .825 | |
| 81-83 RX7 | 3.674 | 2.217 | 1.432 | 1.00 | .825 | |
| 84-85 RX7 12a | 3.622 | 2.186 | 1.419 | 1.00 | .758 | |
| 84-85 13b GSLSE | 3.622 | 2.186 | 1.419 | 1.00 | .807 | |
| 1986 RX7 Non-Turbo | 3.475 | 2.002 | 1.366 | 1.00 | .711 | |
| 87-88 RX7 Non-Turbo | 3.475 | 2.002 | 1.366 | 1.00 | .697 | |
| 89-92 Non-Turbo w/o LSD | 3.475 | 2.002 | 1.366 | 1.00 | .697 | |
| 89-92 Non-Turbo with LSD | 3.475 | 2.002 | 1.366 | 1.00 | .756 | |
| 86-88 RX7 Turbo | 3.483 | 2.015 | 1.391 | 1.00 | .762 | |
| 89-95 RX7 Turbo | 3.483 | 2.015 | 1.391 | 1.00 | .719 | |
| Miata 5-Speed | 3.13 | 1.833 | 1.303 | 1.00 | .814 | |
| 93-95 RX7 Turbo | 3.483 | 2.015 | 1.391 | 1.00 | .719 | |
| 04-08 RX8 | 3.76 | 2.269 | 1.645 | 1.187 | 1.00 | .843 |
| 99- Miata | 3.76 | 2.269 | 1.645 | 1.257 | 1.00 | .843 |
| 09- RX8 | 3.815 | 2.260 | 1.640 | 1.177 | 1.00 | .843 |
RX7 Stock Rear Axle Ratios |
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| Year/Model | Ratio | Year/Model | Ratio | |
| 79-85 | 3.909 | 86-88 Automatic | 3.909 | |
| 83-84 12a | 3.933 | 89-92 Turbo | 4.10 | |
| 84-85 13b GSLSE | 4.076 | 89-92 Non-Turbo/Non LSD | 4.10 | |
| 85 12a | 3.909 | 89-92 Non-Turbo Viscous LSD | 4.30 | |
| 86-88 5-speed Turbo & Non Turbo |
4.10 | 93-95 Manual Trans | 4.10 | |
| 93-95 Automatic | 3.909 | |||
Click here for a PDF of Transmisson and Differential Ratio Charts.
Transmission and Differential Ratio Charts PDF