Zumbrota Drivetrain

Rear Axle Kit

$261.89

SKU: ZA K630104

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

Description

The Zumbrota Drivetrain ZA K630104 is a comprehensive rear axle kit engineered for GM 8.5-inch differentials. This kit provides a direct replacement solution, featuring a 30-spline count and a 6-lug configuration suitable for rear applications. The axle measures 31.5 inches in length, ensuring proper fitment for compatible GM 8.5" differentials. Included in this kit is a new wheel bearing with a 2.53-inch outer diameter, designed for optimal performance and longevity. Alongside the bearing, the kit contains all necessary components for installation, such as a seal, a differential cover gasket, studs, and lug nuts. This ensures that you have the essential parts for a complete and successful replacement of your rear axle components. Manufactured by USA Standard Gear, this kit is identified by SKU ZA K630104. The product details specify its application for GM 8.5 in. Differentials, a rear setup with 6 lugs and 30 splines, and a total length of 31.5 inches.

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 K630104
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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