USA Standard Gear

H233B 31 Spline Differential Locker

$735.89

SKU: SL NPATROL-31

In Stock
In Stock
Ships by Aug 31
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

The USA Standard Gear Spartan Locker, model SL NPATROL-31, is a performance differential locker engineered to provide reliable, 100% lockup traction for Nissan Patrol vehicles equipped with the H233B differential and 31 spline axles. This "lunchbox" style locker replaces the factory spider gears within a standard open carrier case, offering a cost-effective solution for enhanced off-road capability. Constructed from robust 9310 steel, it is built for added strength and durability in demanding conditions. The innovative design of the Spartan Locker eliminates the need for thrust washers, featuring a unique spring and pin system that simplifies installation. It is specifically designed to fit Nissan H233B differentials with 31 spline axles. The product includes a 1-year warranty against manufacturer defects. It is important to note that this locker is not covered by warranty for tires exceeding 33 inches in diameter. The application summary indicates fitment for 1961-1969 Nissan Patrol models (Rear).

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

BrandUSA Standard Gear
Part NumberSL NPATROL-31
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.

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