Zumbrota Drivetrain

GM 8.5" Differential Install Kit

$209.63

SKU: MK GM8.5OLDS-28

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

Description

This Yukon Minor install kit provides essential components for the installation of differential components in GM 8.5" Oldsmobile 442 and Cutlass models. Specifically designed for 8.5" Oldsmobile differentials, this kit ensures compatibility with axles featuring 28 splines. The comprehensive set includes a pinion seal to prevent leaks, a crush sleeve for proper bearing preload adjustment, a complete shim kit to fine-tune gear mesh, and marking compound with an applicator brush for precise pattern checking. Manufactured by Yukon Gear and Axle, this kit is a cost-effective solution for gear changes. It contains all the necessary small parts for a proper differential rebuild or gear set installation, simplifying the process for mechanics and enthusiasts alike. The inclusion of these specific components helps ensure the longevity and optimal performance of the differential after installation. Beyond the core components, the kit aims to streamline the installation process by providing a user-friendly set of parts. While specific installation instructions are not detailed, the inclusion of marking compound and a brush indicates the need for proper gear pattern checking, a critical step in ensuring correct differential operation and durability.

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

BrandZumbrota Drivetrain
Part NumberMK GM8.5OLDS-28
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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