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Advance Adapters Rubicon Kit

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Advance Adapters came up with the Rubicrawler Kit to add a 2.72:1 planetary set to the 4:1 Rock-Trac transfer case to provide two more gear range options. Advance was able to cunningly stuff the six-pinion planetary in the area taken by a dead-space transmission housing on the tail of the 42RLE automatic transmission in ’03-to-’10 Wranglers. This allows installation of a doubler kit without the need for driveshaft or crossmember modifications. Slick!