Product images and videos 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.
Professional / shop required
Overview
This gear set includes a 9-tooth pinion and a 39-tooth ring gear with a 15.4-inch ring gear diameter. The package includes the necessary pinion nut and cotter pin for installation. It is manufactured in Mexico and is a core component for heavy-duty commercial axle assemblies used by major truck manufacturers.
Professional installation is recommended for differential gear sets, requiring precise setup of backlash and contact patterns. Users should ensure compatibility with their specific axle housing and carrier configuration before purchase, as these parts are axle-specific rather than vehicle-specific.
As a high-performance or heavy-duty drivetrain component, it is designed for durability under load in commercial applications. Users are encouraged to follow established break-in procedures to ensure longevity of the gear set.
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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 | Dana |
| Part Number | D00O 25-513366 |
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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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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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