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Mazda ring & pinion teeth counts

Rear ratios
Pinion gear teeth Ring Gear teeth Ratio Notes
8 41 5.125 Aftermarket
8 37 4.625 NZ Kia Sportage 4x4
9 43 4.778 US Kia Sportage 4x4
9 40 4.44 Truck
10 41 4.1 94-97 Miata and 99+ automatic Miata
10 43 4.3 99 Miata stick
11 40 3.636 2001+ Australian 6-speed
11 43 3.909 Miata 6-speed, RX-7 automatic, 79-83 RX-7 all
legacy:      
9 37 4.11 616
10 37 3.7 808/72-75 RX-3
11 40 3.636 RWD 626
11 41 3.727 76+ RX-3
12 49 4.083 Late 84-85 GSL-SE
13 53 4.077 Early 84 GSL-SE
15 59 3.933 84 12a RX-7
13 43 3.308 82-84 B2000/Courier Diesel
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