USA Standard Gear

Rear Axle Shaft Kit, 28 Spline, 29 7/8-Inch

$266.89

SKU: ZA K630848

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

Description

The USA Standard Gear ZA K630848 Rear Axle Shaft Kit is specifically engineered for GM 8.2-inch differentials, offering a robust solution for replacement or upgrade needs. Constructed from advanced alloys and subjected to heat treatment, the ZA K630848 provides superior strength and resilience compared to OEM axles, capable of handling both daily driving demands and more aggressive performance use. This comprehensive kit includes all essential components for installation: the axle shaft itself, a SET9 tapered axle bearing, a bearing spacer, an axle seal, and the necessary studs and lug nuts. Compatibility should always be verified with your vehicle's existing setup, and it's advisable to order multiple kits if your application requires it, as this kit fits the rear position. This axle kit is compatible with a range of Pontiac models, including Bonneville (1964-1972), Catalina (1970-1972), Firebird (1967-1972), GTO (1964-1967 & 1970-1972), and Tempest (1964-1970). Always confirm your vehicle's specifications against the provided details to ensure a proper fit.

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

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandUSA Standard Gear
Part NumberZA K630848
CategoryDrivetrain

We’re here — turning wrenches, just like you.

Call us, follow along, or come say hi.

Buy with Confidence

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.

View Full Return Policy

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.

View Full Shipping Policy