Advance Adapters RubiCrawler Jeep Reduction Gearbox - Jeep Gearing
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6. When you're installing in front of a TJ or JK New Process 231 or NP241, you have the option of 1:1, 2.72:1, and 7.40:1 gearing. Put the RubiCrawler in a Wrangler Rubicon with the NP241OR Rocktrac transfer case and you have 1:1, 2.72:1, 4.0:1, and 10.88:1 gearing available. View Related Article
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