4WD Auto Locking Hub Assembly (99-04 4WD F-250 Super Duty w/ 1C34 Prefix Tag)

The original 4WD locking hub on certain Ford and Lincoln SUVs and pickups often fails due to the brittle sintered shift dial breaking, or the rubber diaphragm dry-rotting over time. This OE FIX solution features a reinforced shift dial that is 40 percent stronger than the factory design, as well as an improved diaphragm made of HNBR rubber with anti-ozone, anti-oxidation and UV-resistant additives to help prevent future failures.Improved design - this 4WD locking hub has a reinforced shift dial that can withstand 40 percent more torque force than the factory design to help prevent it from breaking in the futureUpgraded materials - features an improved diaphragm made of HNBR rubber with anti-ozone, anti-oxidation and UV-resistant additives for greater durabilityRigorously tested - this design has undergone more than 15 performance tests, including tests for salt spray corrosion, extreme cold durability, thermal cycling, and vacuum durability

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