What does 'thick' gear set mean for my GM 12-bolt truck?

A 'thick' gear set like this one is designed to be used with a carrier that originally had a 3.42 or numerically lower gear ratio. It has a slightly different tooth profile to ensure proper meshing in those specific carriers.

What vehicles does this Yukon Gear & Axle ring and pinion set fit?

This set is designed for GM 12-bolt truck axles found in many Chevrolet and GMC trucks and SUVs from the mid-1960s through the late 1980s. This includes models like the Chevrolet C10, K10, and GMC C15, K15.

Does this ring and pinion set come with installation hardware?

This listing is for the ring and pinion gears only. You will need to purchase or have separate installation components such as bearings, seals, and shims for a complete installation.

Yukon Gear & Axle Ring & Pinion 4.56 Ratio ZG GM12T-456T

Name: USA Standard Ring & Pinion Thick Gear Set For GM 12 Bolt Truck in a 4.56 Ratio
Brand: Yukon Gear & Axle
Price: 390.89 USD
Availability: InStock

USA Standard Ring & Pinion Thick Gear Set For GM 12 Bolt Truck in a 4.56 Ratio

$390.89

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Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Yukon Gear & Axle 4.56 ratio thick ring and pinion set for GM 12 Bolt trucks. Designed to exceed OEM specs.

Key Features

Fits GM 12 Bolt truck rear ends.
Features a 4.56 gear ratio for improved acceleration.
This is a "thick" gear set, designed for carriers with 3.42 and numerically lower original ratios.
Built to exceed OEM specifications with rigorous quality evaluation.
Designed for durability and reliable performance.

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Will this fit your vehicle?

Product Details

If you're working on a GM 12-bolt truck rear end and looking to change your gear ratio, this USA Standard Gear ring and pinion set is a solid option. This set comes in a 4.56 ratio, which is great for getting more acceleration out of your truck, especially if you've added larger tires. It's specifically a "thick" gear set, meaning it's designed to work with carriers that originally came with ratios of 3.42 and numerically lower.

USA Standard Gear puts these sets through rigorous quality checks to make sure they meet or exceed OEM specifications. They're built to last, and you can expect them to perform reliably on the road. This set is designed for the GM 12-bolt truck axle, a common and robust rear end found in many Chevrolet and GMC trucks from the mid-60s through the late 80s.

When installing a new ring and pinion, it's always a good idea to have the proper setup tools and to follow the manufacturer's instructions carefully for bearing preloads and gear mesh. This ensures you get the best performance and longevity out of your new gears.