What is a positraction differential and how does it work?

A positraction differential, also known as a limited-slip differential (LSD), is designed to send power to both drive wheels simultaneously. Unlike an open differential that sends power to the wheel with the least traction, an LSD uses clutches or gears to ensure both wheels receive torque, improving traction in slippery conditions or during hard acceleration.

What gear ratio is this differential designed for?

This Yukon Dura Grip positraction differential is specifically designed for vehicles equipped with a 4.10 gear ratio or any numerically higher gear ratio, such as 4.11, 4.56, or 4.88.

What is the recommended break-in procedure for this differential?

For differentials with composite clutches, it's important to follow the manufacturer's recommended break-in procedure. This typically involves driving for a specific mileage (often 500 miles) without hard acceleration or cornering, and changing the differential fluid afterward to remove any clutch material.

Yukon Gear Dura Grip Positraction For GM 12 Bolt Car w/ 30 Spline Axles / 4.10+

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Specifications

Brand: Yukon Gear & Axle
Part #: YDGGM12P-4-30-1
UPC: 883584260134

Yukon Gear Dura Grip Positraction For GM 12 Bolt Car w/ 30 Spline Axles / 4.10+

Name: Yukon Gear Dura Grip Positraction For GM 12 Bolt Car w/ 30 Spline Axles / 4.10+
Brand: Yukon Gear & Axle
Price: 934.89 USD
Availability: InStock

$934.89

Only 1 left in stock

Yukon Gear Dura Grip Positraction for GM 12 Bolt cars with 30 spline axles and 4.10+ gear ratios. Smooth yet aggressive traction for performance vehicles.

Key Features

Fits GM 12-bolt rear ends with 30-spline axles and 4.10 gear ratios or higher.
Features a strong nodular iron case for enhanced durability.
Includes forged 4320 chromoly spider gears for superior strength.
Utilizes composite clutches for smooth yet aggressive limited-slip action.
Fully rebuildable design allows for long-term service and performance.
Proudly assembled in the USA.

⚠️ 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 improve traction for your classic GM muscle car, the Yukon Gear & Axle Dura Grip positraction differential is a solid choice. This unit is designed to fit GM 12-bolt rear ends with 30-spline axles and is intended for vehicles running a 4.10 gear ratio or numerically higher. It's built to handle the demands of performance driving, giving you more confidence when you put the power down, whether you're cruising or hitting the drag strip.

What sets the Dura Grip apart is its well-built construction. It features a strong nodular iron case for durability, and the spider gears are forged from 4320 chromoly steel, known for its strength. The unit uses composite clutches that provide smooth engagement for everyday driving, but can still deliver aggressive traction when needed. This positraction unit is also designed to be fully rebuildable, meaning you can service it down the road to keep it performing at its best. It's assembled in the USA, reflecting a commitment to quality manufacturing.

This limited-slip differential is a great upgrade for a wide range of GM vehicles from the 1960s and early 70s, including popular models like the Chevrolet Chevelle, Impala, and Pontiac GTO. When installing, remember to follow the manufacturer's instructions carefully, especially regarding proper gear oil and any break-in procedures to ensure the longevity of the composite clutches.