USA Standard 5.13 Ratio Ring & Pinion Gear Set

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Drivetrain› Differentials and Rear-End Components

Zumbrota Drivetrain

USA Standard 5.13 Ratio Ring & Pinion Gear Set

Name: USA Standard 5.13 Ratio Ring & Pinion Gear Set
Brand: Zumbrota Drivetrain
SKU: ZG D44JK-513RUB

$286.89

SKU: ZG D44JK-513RUB

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Overview

The USA Standard replacement Ring & Pinion gear set is designed for the Dana 44 JK rear axle. This gear set features a 5.13 ratio, a 24 spline pinion, and an 8.89" ring gear diameter.

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The USA Standard replacement Ring & Pinion gear set is specifically engineered for the Dana Spicer 44 JK rear axle, offering a 5.13 gear ratio to optimize performance for larger tires or heavier loads. This ring and pinion set is constructed to exceed OEM specifications, ensuring durability and reliability. Each set undergoes rigorous in-house quality evaluation, including dimensional, material, and fitment testing, to meet high standards. The set includes a 24-spline pinion and features an 8.89" ring gear diameter with 10 ring gear bolts. While specific vehicle fitment details are managed via a 'Select Vehicle' tool on the product page, the core application is the Dana 44 JK rear axle. Buyers are encouraged to contact Zumbrota Drivetrain's tech support via phone or chat if they have questions regarding fitment for their specific build project.

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	ZG D44JK-513RUB
Category	Drivetrain

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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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