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Drivetrain› Differentials and Rear-End Components

USA Standard Gear

Spartan Locker, Dana 44HD 30 Spline

Name: Spartan Locker, Dana 44HD 30 Spline
Brand: USA Standard Gear
SKU: SL D44HD-30

$733.99

SKU: SL D44HD-30

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$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Overview

The USA Standard Gear Spartan Locker is a lunchbox locker designed for Dana Spicer 44HD differentials with 30 spline axles. It provides reliable, 100% lockup traction and features a spring and pin design for easy installation. Made from 9310 steel, this mechanical locker replaces the spiders in a standard carrier case.

Show original supplier description

The USA Standard Gear Spartan Locker is a robust lunchbox locker engineered to significantly enhance off-road capability for your vehicle's Dana 44HD differential. Featuring a 30 spline count and constructed from high-strength 9310 steel, this locker guarantees reliable, 100% lockup traction in demanding conditions. Its innovative spring and pin design eliminates the need for thrust washers, simplifying installation and ensuring a secure fit within a standard carrier case. This mechanical locker provides consistent power distribution to both wheels, offering a noticeable improvement in grip and stability for tackling tough terrains. The Spartan Locker is designed for 1996-2004 Jeep Grand Cherokee ZJ and WJ models. Installation is straightforward, with an approximate time of 20 minutes and a simple difficulty level.

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	USA Standard Gear
Part Number	SL D44HD-30
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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