Based on the Silvia S15 Spec-R 6-speed transmission, this reinforced cross 6-speed transmission assembly has an updated gear ratio, making for a more enjoyable driving experience with increased gear strength. The NISMO Reinforced Cross Transmission draws on the strengths of the standard FS6R92A. Through reinforcement and optimization of the gear ratio, we've reached a level of operation incomparably better than competition-only dog transmissions or the synchro transmissions of the past.

Possessing the ideal gear ratio for performance driving and drifting, the 1st and 2nd gear ratios are brought closer to 3rd gear, and 6th gear is closer to 5th gear. Most competition gears in the market emphasize strength and ease of production in the design process and deliver a lower gear engagement ratio with rougher tooth surfaces that can cause a noisy whizzing sound when used for everyday driving. NISMO carefully considered these factors, and developed gear ratio specifications that allow for normal, street driving as well as high performance driving.

Greater strength was gained by changing the gear ratio and increasing the gear's diameter. Where the gear ratio was not changed, the module was fortified by reducing the number of both counter and main gear teeth and increasing the size of the individual gear teeth. The thrust power shock to the front of the counter-shaft caused by shock torque was diminished by reducing the torsion angle. This also helps to avoid potential damage to the end surface of the counter-reverse gear.

Because the S15 speedometer obtains its signal from an ABS sensor, there is no speed drive gear on the transmission. Because of this, no speedometer indications are available on the S13 and S14. When installing the NISMO Reinforced Cross Transmission in the S13 or S14, a special speedometer drive gear must be attached.

Additional parts are needed to install this transmission for S13 / S14 & S15 Spec-S:

• Transmission Cross-member (11331-89F00)
• Shifter Lever (32839-89F00)
• Shift Lever Snap Ring (32204-AA411)
• Shifter Insulator (74967-89F00)
• Shifter Cover (74966-89F00)
• Driveshaft
• S15 SR20DET Clutch & Flywheel (3000S-RSS50-G1 or equivalent)
• Reverse Switch Extention Harness (32015-RRS50)
• Neutral Switch Extension Harness (32016-RRS50)

NOTE: When installing on S15 Spec-S (SR20DE), S14, & (R)S13, the flywheel and clutch must be replaced with one for an S15 (SR20DET).