Zumbrota Drivetrain

GM 8.5-Inch Rear Axle Kit

$274.89

SKU: ZA K630108

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

Description

The Zumbrota Drivetrain ZA K630108 is a rear axle kit engineered for GM 8.5-inch differentials. This kit is built with 30 splines and a 5-lug configuration, ensuring compatibility with specific axle setups. Included in this comprehensive kit are essential components for a complete rear axle repair or upgrade. You will find a new wheel bearing with a 2.88-inch outer diameter, a replacement seal, a differential cover gasket, and all necessary studs and lug nuts. The axle itself measures 33.375 inches in length. This rear axle kit is specifically designed to fit GM 8.5-inch differentials. The product details confirm its 30-spline count and rear 5-lug pattern, making it a direct replacement or upgrade for compatible vehicles.

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

BrandZumbrota Drivetrain
Part NumberZA K630108
CategoryDrivetrain

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

Call us, follow along, or come say hi.

(760) 282-4645 Instagram Google

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