Zumbrota Drivetrain

4.11 Ratio 8.5-Inch Rear Ring and Pinion Kit

$641.89

SKU: ZGK2023

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

Description

The Zumbrota Drivetrain ZGK2023 is a complete rear ring and pinion kit designed to provide a one-stop solution for differential repairs. This kit is specifically engineered for GM 8.6-inch axles, featuring a 4.11 gear ratio for enhanced performance and an 8.5-inch ring gear diameter. It is built for applications that utilize a 10-bolt rear cover and a 10-bolt ring gear configuration. This comprehensive kit includes a USA Standard Gear ring and pinion set, paired with a master install kit from Quick Kits. Additionally, the ZGK2023 provides LM603049/LM603012 carrier bearings and races, which have a 1.781-inch inside diameter and a 3.062-inch outside diameter. Axle bearings and seals are also included, ensuring a complete and convenient package for differential maintenance or upgrades.

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 NumberZGK2023
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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