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6 Speed

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The NSG 370 six-speed is a sweet addition to the Wrangler line. Combining the 4.46 First gear with the 4:1 in the transfer case and the 4.11 gears in the axles gets you a crawl ratio of 73:1. Savvy swappers will notice the lack of a removable bellhousing on the NSG 370, but it seems as though it could be easily adapted to an earlier Wrangler in need of six-speeds.