Technic, Gear Differential, 24-16 Teeth

The Heart of a Technic Vehicle

The LEGO® Technic Differential is a brilliant piece of engineering and the single most important part for creating realistic, functional vehicles. Its clever internal design allows the two wheels on an axle to rotate at different speeds, which is essential for smooth and stable cornering. When a car turns, the outside wheel has to travel a longer distance than the inside wheel—without a differential, the wheels would skip and lose traction. This part is the solution, making it a cornerstone of advanced Technic building.

Applications for Smooth Cornering

This differential is a must-have for the drivetrain of any wheeled creation, from supercars to heavy-duty trucks.

• Realistic Drivetrains: Install it on the drive axle of your car or truck to allow for smooth turning, just like a real vehicle. It's the key to building a high-performance LEGO car.
• 4x4 and All-Wheel Drive Systems: For truly complex models like the iconic 8880 Super Car, builders use up to three differentials—one for the front axle, one for the rear, and a central one to manage power between the front and back. [11]
• Advanced Gear Ratios: Expert builders can even use the unique properties of a differential to create complex, non-standard gear ratios for specialized machinery. [17]

Pair this differential with other essential components from our Technic gears and axles collections to build your next advanced vehicle.

Key Specifications

• Part ID: 6573
• Gear Teeth: 24-tooth on one side, 16-tooth on the other.
• Internal Gears: Contains three 12-tooth bevel gears. [2]
• Function: Allows connected axles to rotate at different speeds.
• Compatibility: Designed for use within standard Technic frames and can be driven by parallel gears.

A Little Piece of Trivia

This differential housing (part 6573) was introduced in 1994, famously debuting in the legendary 8880 Super Car set. [1, 11] It replaced an older, bulkier differential design from 1980 that used different gearing. [2] This newer, more compact and versatile design, with its 24 and 16-tooth gear options, quickly became the standard for nearly all high-performance LEGO Technic vehicles for decades. [1, 2]

Ready to build vehicles that handle like the real thing? Add this essential differential to your parts collection now!

LEGO® parts are intended for builders aged 4 and up. They may pose a choking hazard for children under 3 years old.