USA Standard Gear

Rear Axle Kit 30 Spline 5x4.75 Bolt Pattern

$290.89

SKU: ZA K630840

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

Description

The USA Standard Gear ZA K630840 rear axle kit is engineered for GM 12P differentials, offering a direct replacement or upgrade solution. This kit features a 30-spline axle shaft with a length of 31.375 inches, designed to accommodate a 5x4.75 inch bolt pattern and a 1.620 inch journal size. The advanced heat-treating process applied to the alloys used in its construction results in a stronger, more durable axle shaft. This comprehensive kit includes all necessary components for installation, such as the axle shaft itself, a new wheel bearing, a seal, a differential cover gasket, and studs with matching lug nuts. Specifically, this axle shaft kit is designed for the rear application on 1966-1970 Chevrolet Caprice models and 1965-1970 Chevrolet Impala models. It is compatible with the GM 12 Bolt Passenger Car differential.

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 K630840
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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