Honda Civic SiR

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Honda Gearbox Ratios

This page contains the gearbox ratios that can be found in all of the different JDM (Japan Domestic Market) B series transmissions. It also details whether or not the transmission is available with an LSD (limited slip differential).

JDM Honda Gearbox Ratios
Code S80 Y21/Y80/S80/S4C S80/Y80 Y1 YS1 S1/J1
Car JDM Integra Type R 98+ (LSD) JDM 96-97 Integra R (LSD)
JDM Civic R [EK9] (LSD)
JDM Civic SiR [EK4, EG6] (optional LSD)
JDM SiR-G (optional LSD) JDM CRX/Civic SiR [EF8, EF9] (optional LSD) JDM 92-93 XSi Integra (optional LSD) JDM 90-91 Integra XSi [DA-6]
Type Hydraulic Hydraulic Hydraulic Cable Cable Cable
1st 3.230 3.230 3.230 3.166 3.307 3.230
2nd 2.105 2.105 1.900 2.052 2.105 2.105
3rd 1.458 1.458 1.360 1.416 1.458 1.458
4th 1.034 1.107 1.034 1.103 1.107 1.107
5th 0.787 0.848 0.787 0.870 0.880 0.848
Reverse 3.000 3.000 3.000 3.000 3.000 3.000
Final Drive 4.785 4.400 4.400 4.266 4.400 4.400

You can use any B-series transmission (cable or hydraulic) with any B-series block as long as you make sure that you use the correct clutch, flywheel, and intermediate shaft.