TEN Factory MG20137B, Bolt Pattern Spline Drive Axle Shaft for Dana 30 JK Reverse, Front Inner 18.81" 27 Spline Chromoly, Driver Side Fits Jeep Wrangler (2007–2018) Replaces Spicer 2004511-1

Short Summary: The TEN Factory MG20137B Front Inner Axle Shaft is a performance upgrade for Dana 30 JK Reverse axles on 2007–2018 Jeep Wrangler models (excluding Rubicon and Unlimited Rubicon). Precision-engineered and made from high-strength 4340 chromoly, this shaft improves durability for demanding off-road conditions.Key FeaturesAxle Type: Front Inner (Driver Side)Application: Dana 30 JK ReverseSpline Count: 27 SplineLength: 18.81 InchMaterial: 4340 Chromoly SteelU-Joint Type: 5-760X Compatible (1310 WJ Series)Finish: Black Oxide CoatingExclusions: Not for Rubicon or Unlimited RubiconNote: 2012–2017 JK requires outer shaft MG20141B & U-joint 5-760XVehicle CompatibilityJeepWrangler (2007–2018) – Excludes Rubicon and Unlimited RubiconReplaces OEM & Aftermarket Part NumbersAlloy USA: 10137Spicer: 2004511-1, 2005600-1Revolution Gear & Axle: DC6581Warranty & Quality Assurance TEN Factory backs the MG20137B with a 1-Year Warranty. Made from premium 4340 chromoly and finished in black oxide, this axle shaft ensures optimal strength, rust resistance, and performance in any terrain.

• Designed for Dana 30 JK Reverse front axles, this performance inner shaft fits 2007–2018 Jeep Wrangler driver (LH) side applications.
• Measures 18.81" in length with 27 splines and fits 5-760X U-joints; ideal for standard JK (excludes Rubicon & Unlimited Rubicon).
• Built from ultra-durable 4340 chromoly steel for maximum strength and off-road reliability.
• Black oxide coating resists corrosion while maintaining a factory-like fit and finish; replaces Spicer 2004511-1 and others.
• 1-Year Warranty backed by TEN Factory quality; 2012–2017 models require companion outer shaft MG20141B and 5-760X U-joint.