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Drivetrain› Differentials and Rear-End Components

Zumbrota Drivetrain

9" Differential Dropout Assembly

Name: 9" Differential Dropout Assembly
Brand: Zumbrota Drivetrain
SKU: YDAF9-456YGL-35

$1,864.89

SKU: YDAF9-456YGL-35

Free Shipping over $200

$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Yukon Dropout Assembly is a differential upgrade for Ford 9” housings. It features a 4.56 gear ratio and 35 spline count. This assembly includes a Yukon Grizzly Locker for enhanced traction and performance.

Constructed with a nodular iron case for increased rigidity and durability, this unit is fully shimmed and backlashed to specification.

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The Yukon Dropout Assembly is a fully assembled differential upgrade designed for Ford 9” housings. It comes ready for installation, pre-shimmed and backlashed to precise specifications by expert Yukon technicians. This unit features a robust nodular iron case, which enhances rigidity and power handling capabilities. This material construction reduces deflection, ensuring consistent gear contact and contributing to a long service life. Key specifications include a 4.56 gear ratio, 35 spline count, and it is specifically designed to fit Ford 9” differentials. It's important to note that this dropout assembly does not include a yoke.

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	YDAF9-456YGL-35
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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