the Miata setup and preparation portal Flyin' Miata tech line 970 464 5600 

Miata 5th gear interchange

Input teeth

Counter Teeth

Miata.814 gear teeth

40 18 0.45

Miata Input shaft teeth

21 38 1.8095238
Net ratio

0.8142857>

RX-7 .697 gear teeth

41 17 0.4146341

Miata Input shaft teeth

21 38 1.8095238
Net ratio

0.7502904

RX-7 .711 gear teeth

52 22 0.4230769

Miata Input shaft teeth

21 38 1.8095238
Net ratio

0.7655678

RX-7 .758 gear teeth

51 23 0.4509804

Miata Input shaft teeth

21 38 1.8095238
Net ratio

0.8160598

RX-7 .807 gear teeth

50 24 0.48

Miata Input shaft teeth

21 38 1.8095238
Net ratio

0.8685714
provided by Flyin' Miata | tech line 970 464 5600