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Drivetrain› Differentials and Rear-End Components

OX

Locking Differential for Dana 44 Axles (30 Spline, 3. Ratio)

$1,208.90 $1,099.00 Save $109.90

SKU: D44-392-30

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The OX D44-392-30 is a locking differential designed for Dana 44 axles with 30-spline counts and gear ratios of 3.92 or higher. This traction aid allows for instant differential locking to improve performance on tough off-road terrain. A heavy-duty cover is included with each unit.
Show original supplier description
The OX D44-392-30 is a high-performance locking differential engineered for Dana 44 axle assemblies that utilize 30-spline shafts and gear ratios of 3.92 or numerically higher. By providing selectable traction, this unit allows drivers to engage the locker only when needed, maintaining off-road capability in a wide variety of conditions. Each differential is supplied with a heavy-duty cover to provide extra protection against trail hazards. This locker supports multiple shifting configurations, including manual, air, and electric activation methods, which can be selected to suit specific vehicle setups. Proper operation requires the selection of a compatible shifting system, such as a manual cable, air actuator, or electric solenoid, which are sold separately to complete the installation. Users should consult the shifter selection guide to ensure the chosen components align with their vehicle's specific layout and routing requirements.

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

BrandOX
Part NumberD44-392-30
CategoryDrivetrain
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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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