USA Standard

GM 12T-456 Ring and Pinion Gear Set, 4.56 Ratio

$290.99

SKU: ZG GM12T-456

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

Description

The Zumbrota Drivetrain ZG GM12T-456 ring and pinion gear set is engineered for optimal performance in GM 12-bolt truck differentials. This USA Standard gear set offers a precise 4.56 gear ratio, which is ideal for improving acceleration and towing capabilities by altering the final drive ratio. Constructed to meet rigorous standards, the ZG GM12T-456 features an 8.875-inch ring gear diameter, ensuring robust torque transfer. The pinion is designed with 30 splines for secure engagement, and the ring gear is held in place by 12 bolts, contributing to the overall durability and reliability of the drivetrain. This set is specifically manufactured for GM 12-bolt truck applications, providing a direct fit for compatible rear ends.

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

BrandUSA Standard
Part NumberZG GM12T-456
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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