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Drivetrain› Differentials and Rear-End Components

USA Standard Gear

Rear Axle Shaft Kit, 28 Spline, 5-Lug

Name: Rear Axle Shaft Kit, 28 Spline, 5-Lug
Brand: USA Standard Gear
SKU: ZA K630111

$191.89

SKU: ZA K630111

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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 7.625 in. differentials. It features 28 splines and a length of 28.8125 inches, with a rear 5-lug pattern. The kit includes a wheel bearing with a 2.25 in. outer diameter, a seal, differential cover gasket, studs, and lug nuts. USA Standard Gear utilizes advanced alloys and heat-treating technologies to produce durable axles.

Show original supplier description

The USA Standard Gear ZA K630111 Rear Axle Shaft Kit is engineered to provide a direct fit for GM 7.625-inch differentials, offering a reliable solution for replacement, repair, or upgrade needs. Built to meet or exceed OE quality standards, these axle shafts are heat-treated to enhance strength and ensure years of dependable service. This kit is specifically designed for applications requiring a 28-spline count and a 5-lug pattern. Key specifications include a differential size of 7.625 inches, an overall length of 28.8125 inches, and a wheel bearing outer diameter of 2.25 inches. The robust construction aims to restore vehicle functionality efficiently, getting you back on the road quickly. USA Standard Gear focuses on delivering parts that are easy to install, minimizing downtime. This axle shaft kit includes all necessary components to complete the installation, making it a straightforward process for mechanics and enthusiasts alike.

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 K630111
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.

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