Zumbrota Drivetrain

Yukon Gear Ring & Pinion Gear Set 3.90 Ratio 12 Bolt 8.875

$581.89

SKU: YG GM12P-390

In Stock
In Stock
Ships by Sep 1
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$100 Minimum Order
30 Days Return

Description

The Zumbrota Drivetrain YG GM12P-390 is a high-performance Yukon Ring & Pinion gear set engineered for GM 12 bolt passenger cars. Built by Yukon Gear and Axle, these sets are recognized for their quality, utilizing advanced design, heat-treating, and testing processes to meet exacting specifications. This specific gear set features an 8.875" ring gear diameter and requires 12 ring gear bolts for installation. It includes a 30 spline pinion and a 3.90 gear ratio. This ratio is ideal for drivers looking to optimize their vehicle's traction performance, especially after upgrades such as increased horsepower or larger tires. Yukon Gear & Axle's commitment to quality ensures durability and reliability. The company also offers the Y.E.S. Plan, a comprehensive lifetime protection plan for gear sets.

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 NumberYG GM12P-390
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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