Sale

Zumbrota Drivetrain

Master Overhaul Kit for GM 8.5" Rear End

$338.99 $338.89 Save $0.10

SKU: YK GM8.5-HD

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

Description

The Yukon Master Overhaul kit is designed to service GM 8.5-inch differentials that feature aftermarket Positraction units. This comprehensive kit provides all the essential components for a thorough rebuild, ensuring proper function and longevity of your differential. The kit also contains premium seals to prevent leaks and maintain lubrication. Additionally, you will find a complete shim kit for precise gear setup, ring gear bolts, a pinion nut, and a crush sleeve for correct bearing pre-load. To aid in the installation and setup process, the kit supplies thread locker, marking compound with a brush for gear pattern analysis, and a new differential gasket. This overhaul kit is specifically engineered for GM 8.5" rear differentials equipped with aftermarket Positraction systems. Please verify your differential's specifications 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

Fitment Guaranteed

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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 NumberYK GM8.5-HD
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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