NSG370

From JeepForum.com Community Jeep Wiki

For 2005, Jeep Liberty and Jeep Wrangler will feature the NSG 370 six-speed manual transmission, replacing two five-speed manual transmissions previously used in these applications--the NV1500 and NV3550—reducing cost and complexity. This new transmission is a member of the six-speed NSG 370 family, similar to the one used in the Chrysler Crossfire—the first six-speed for the Chrysler Brand. The NSG six-speed manual transmission provides a 4.46:1 First-gear ratio, versus the 3.85:1 and 4.04:1 ratios of the five-speed transmissions it replaces, for improved launch and traction.

“Because Jeep vehicles are designed to perform in a variety of challenging off-road conditions, the NSG 370 six-speed manual transmission has a unique gear case and direct-shift system specifically designed for the Jeep application,” said Frank Frederick, Director – Manual and Rear-Wheel-Drive Transmissions and Driveline Engineering, Chrysler Group.

The NSG 370 six-speed manual transmission provides optimal shift quality, improved quietness and high quality. A new dual-ratio transmission shift-tower system allows packaging of the six-speed shift pattern within the existing Jeep vehicles, and it is tuned for optimized shift quality. For smooth operation the First and Second gears have triple-cone synchronization, the Third and Fourth gears feature double-cone and the Fifth and Sixth gears single-cone synchronization. Hard-finished gears allow for quiet operation. A multi-rail, steel-construction shift system delivers high strength and precision. The two-piece aluminum case with integrated clutch housing assures powertrain stiffness and light weight. The new First-gear ratio combined with six-speed step spread allows optimization of axle ratios for fuel economy and performance.

Gear Ratios

1st - 4.46 2nd - 2.61 3rd - 1.72 4th - 1.25 5th - 1 6th - .84 Reverse - 4.06