Air Locker Differential Jeep JK Rubicon, 35 SPLThe Ultimate Rubicon Upgrade: Go Big with 35 Spline Locking Power. The Jeep Wrangler JK Rubicon comes with factory electric lockers, but they have known weaknessesespecially the "smart bar" sensors and the limited strength of the stock axle shafts when running 37 inch or 40 inch tires. The ARB RD157 is not just a replacement; it is a massive upgrade designed to transform your Rubicons Dana 44 into a competition grade axle capable of handling extreme
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