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Drivetrain› Differentials and Rear-End Components

USA Standard Gear

GM 7.5-Inch 28-Spline Rear Axle Kit

Name: GM 7.5-Inch 28-Spline Rear Axle Kit
Brand: USA Standard Gear
SKU: ZA K630103

$199.89

SKU: ZA K630103

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$100 Minimum Order

Non-Returnable Item

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Moderate — 2–4 hours

Overview

The USA Standard Gear rear axle kit is designed for GM 7.5 in. differentials with 28 spline count and ABS compatibility. It features a 29-inch length and a 5-lug pattern. This kit includes essential components such as the wheel bearing, seal, differential cover gasket, studs, and lug nuts, providing a complete solution for axle replacement or upgrade.

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Utilizing advanced alloys and the latest heat-treating technologies, this kit ensures reliability and longevity. This specific kit is designed to fit GM 7.5-inch differentials featuring 28 spline count and ABS systems. The axle measures 29 inches in length and includes a 2.25-inch outer diameter wheel bearing. The kit is intended for rear axle applications with a 5-lug pattern and is suitable for 4WD/AWD vehicles. Included in this comprehensive kit are all the necessary components to get your vehicle back on the road quickly: a wheel bearing, seal, differential cover gasket, studs, and lug nuts. This ensures that you have everything needed for a successful repair or upgrade without needing to source additional parts separately.

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	USA Standard Gear
Part Number	ZA K630103
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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