USA Standard Gear

Rear Axle Kit

$170.89

SKU: ZA K630128

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

Description

The USA Standard Gear ZA K630128 rear axle kit is engineered to provide a strong and durable replacement for your GM 12-Bolt Truck differential. Utilizing advanced alloys and heat-treating technologies, this axle is built to meet or exceed OE quality for reliable service. The kit comes complete with all the necessary components to replace, repair, or upgrade your axle shafts, ensuring your vehicle can be back on the road quickly. Key specifications for this axle include a length of 31.4375 inches, 30 splines, and a rear bolt pattern of 5 x 5 inches. The wheel bearing has an outside diameter of 2.53 inches. All components, including the wheel bearing, seal, differential cover gasket, studs, and lug nuts, are included to facilitate a comprehensive installation. This rear axle kit is specifically designed for various Chevrolet and GMC C10, C15, C1500, and K5 Blazer models from the 1970s and early 1980s, all in rear-wheel-drive configurations. Please verify fitment for your specific year, model, and drive type before purchase.

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

BrandUSA Standard Gear
Part NumberZA K630128
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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