Zumbrota Drivetrain

Rear Axle Kit, 30 Spline, /16" Length

$270.89

SKU: ZA K630144

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

Description

The Zumbrota Drivetrain ZA K630144 is a comprehensive rear axle kit engineered for GM 8.5-inch and 8.625-inch differentials. This direct-fit kit is built to exacting standards, featuring 30 splines for robust engagement and a precise length of 30.9375 inches (30-15/16"). This axle kit comes complete with essential components for a successful installation, including a wheel bearing, seal, differential cover gasket, studs, and lug nuts. The rear axle is designed with a 5 x 4.75-inch bolt pattern and a wheel bearing outer diameter of 2.88 inches, ensuring compatibility with a wide range of GM applications. Manufactured by USA Standard Gear, this kit provides a reliable solution for repairing or upgrading your vehicle's rear axle assembly. Its direct-fit design simplifies installation, minimizing the need for modifications.

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

BrandZumbrota Drivetrain
Part NumberZA K630144
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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