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Drivetrain› Differentials and Rear-End Components

Zumbrota Drivetrain

Yukon Spin Free Kit

Name: Yukon Spin Free Kit
Brand: Zumbrota Drivetrain
SKU: YA WU-15

$2,942.89

SKU: YA WU-15

Free Shipping over $200

$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Yukon Spin Free Kit is a differential and rear-end component designed for Jeep Wrangler JK models from 2007 to 2018. This complete kit includes heavy-duty 4340 Chromoly outer axles with 30-splines and Dana 44 Yukon Hardcore Locking Hubs. It also features front double-drilled rotors, while rear rotors are sold separately.

Show original supplier description

The Yukon Spin Free Kit is a comprehensive differential and rear-end upgrade specifically engineered for Jeep Wrangler JK models produced between 2007 and 2018. The kit includes heavy-duty 4340 Chromoly outer axles with a 30-spline count, ensuring robust performance. It also features Yukon Hardcore Locking Hubs for the Dana 44 differential and front double-drilled rotors. Please note that rear rotors are sold separately. Installation of this kit requires specific wheel fitment, necessitating 5 x 5.5" wheels with a minimum wheel pilot diameter of 105 mm or 4.130". For 2007-2011 Dana 30 stock front axles, which have smaller u-joints, inner axles with the 1350 series (7166x U/joint size) are also required. This kit includes all necessary components for a complete installation, utilizing a 7166 u-joint size.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

Brand	Zumbrota Drivetrain
Part Number	YA WU-15
Category	Drivetrain

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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