Yukon Gear & Axle GM12P-373-4 Ring & Pinion Gear Set - High

In this review the Yukon Gear & Axle GM12P-373-4 ring and pinion set is assessed for drivers who need a durable, precise replacement for a GM 12-bolt passenger car differential. The bottom line: this set is for builders or owners who demand a strong, quiet-running gear set that is designed to handle street, off-road and track duty. The review focuses on build quality, setup characteristics and intended fitment and notes the one-year warranty that backs the product.

Key Features

• Designed for harsh conditions: The gear set is engineered to withstand demanding street, off-road and track use so it holds up under heavy loads.
• Quiet running design: Yukon uses modern design and manufacturing methods to produce a gear set that runs quietly when properly set up.
• Easy to set up: The gears are finished and machined to tolerances that make backlash and preload adjustments more straightforward for competent installers.
• Thin gear for specific carriers: This version is a thin gear designed for a 4.10 and up carrier, making it compatible with certain GM 12-bolt applications.
• 3.73 ratio: The product is supplied in a 3.73 ratio, thin configuration for users who require that specific final drive.
• One-year warranty: Yukon includes a standard one-year warranty that provides backup for manufacturing defects and early failures.

Who It's For

The Yukon GM12P-373-4 is aimed at enthusiasts rebuilding or upgrading a GM 12-bolt passenger car differential who want a balance of strength and quiet operation. It suits street-driven performance cars, weekend trail rigs converted from passenger differentials, and racers who need rugged gears that tolerate heavy use.

It is not intended for every axle swap: installers should confirm they have a compatible carrier (thin gear for 4.10 and up carriers) and the correct axle housing for a 3.73 ratio. Casual drivers who never exceed stock torque levels or those who need a different ratio should look elsewhere.

Pros & Cons

Pros

• Strong construction that is specified for demanding street, off-road and track environments.
• Quiet-running design when set up correctly, reducing drivetrain noise during normal driving.
• Manufactured with current design and machining processes to simplify proper setup and alignment.
• Comes with a one-year warranty for peace of mind after installation.

Cons

• Thin gear design means compatibility is limited to carriers that accept 4.10 and up thin gears, so fitment checks are required.
• Requires competent setup to realize the quiet-running benefits; improper installation can result in noise or premature wear.

Specifications

Brand	Yukon Gear & Axle
Application	GM 12-bolt passenger car differential
Ratio	3.73
Gear type	Thin gear for 4.10 and up carrier
Intended use	Street, off-road, track
Warranty	One-year standard warranty

Our Verdict

The Yukon GM12P-373-4 ring and pinion set is a solid choice for anyone rebuilding a GM 12-bolt passenger differential who needs a durable, quiet and modern-designed gear set in a 3.73 ratio. It offers good value where strength and predictable setup are priorities, provided the buyer confirms carrier compatibility and arranges a proper installation.

Frequently Asked Questions

Is this gear set compatible with my GM 12-bolt housing?
It is designed for GM 12-bolt passenger car differentials but requires a thin gear carrier compatible with 4.10 and up; verify carrier fitment before purchase.

What ratio is this set?
This product is supplied in a 3.73 ratio, thin configuration.

Does it include a warranty?
Yes, Yukon supplies a one-year standard warranty with this ring and pinion set.