What is the purpose of changing the gear ratio to 4.56?

Changing to a 4.56 gear ratio typically results in significantly improved acceleration from a standstill. It also helps to bring your engine's RPMs back down to a more comfortable cruising speed on the highway if you have installed larger tires than stock.

Does this gear set come with all the necessary installation components?

This product is a ring and pinion gear set. Installation typically requires additional components such as bearings, seals, and shims, which are usually sold separately. Always refer to the manufacturer's installation instructions for a complete list of required parts.

What is the Yukon Gear & Axle Y.E.S. Plan?

The Y.E.S. Plan is an optional protection plan offered by Yukon Gear & Axle. It provides lifetime, comprehensive, no-questions-asked coverage for your gear set for as long as you own the vehicle.

Yukon Gear High Performance Gear Set For GM 12 Bolt Car in a 4.56 Ratio

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Specifications

Brand: Yukon Gear & Axle
Part #: YG GM12P-456
UPC: 883584244516

Yukon Gear High Performance Gear Set For GM 12 Bolt Car in a 4.56 Ratio

Name: Yukon Gear High Performance Gear Set For GM 12 Bolt Car in a 4.56 Ratio
Brand: Yukon Gear & Axle
Price: 696.89 USD
Availability: InStock

$696.89

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Yukon Gear & Axle high performance ring and pinion set for GM 12 Bolt cars. 4.56 ratio, YG GM12P-456. Lifetime Y.E.S. Plan available.

Key Features

Fits GM 12 Bolt Passenger Car differentials.
Features an 8.875 inch ring gear diameter.
The ring gear uses 12 bolts for secure mounting.
The pinion gear has 30 splines.
This set provides a 4.56 gear ratio for improved acceleration or tire compatibility.
Yukon Gear & Axle offers a 1-year warranty against manufacturing defects.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Will this fit your vehicle?

Product Details

If you're looking to change your vehicle's gearing for better acceleration or to accommodate larger tires, a new ring and pinion set is a key component. This high-performance set from Yukon Gear & Axle is designed for the GM 12-bolt car differential, offering a 4.56 ratio that significantly alters your vehicle's performance characteristics. This ratio is popular for applications where improved off-the-line acceleration is desired, or to bring cruising RPMs back into a more comfortable range after installing larger tires.

Yukon engineers put a lot of thought into these gear sets. They use high-grade steel for both the ring and pinion gears, and the tooth surface finish is specifically designed to reduce friction and heat. This means less wear and tear during long drives or under high torque conditions, contributing to a longer lifespan for your drivetrain. The fitment is designed to OEM specifications, meaning it should integrate smoothly into your existing GM 12-bolt differential housing. Yukon also backs these sets with a 1-year warranty against manufacturing defects, and they offer an optional Y.E.S. Plan for lifetime, comprehensive protection.

This gear set is designed to fit a range of GM 12-bolt car applications, including popular models like the Chevrolet Chevelle, Pontiac GTO, and Buick Wildcat. When installing a new gear set, it's crucial to follow the manufacturer's break-in procedure to ensure proper seating of the new gears. This typically involves a period of moderate driving without hard acceleration or heavy loads, followed by an oil change.