4.12 Ring & Pinion

The 4.12 Ring & Pinion from Diversified Machine is a precision differential gear set designed for serious performance builds and off-road applications. It is engineered for mechanics and enthusiasts who seek aggressive acceleration and maximum torque multiplication, making it ideal for lifted trucks, trail rigs, and street machines running larger tires or increased engine output.

Manufactured to OEM tolerances, this gear set features precision-cut teeth that ensure smooth engagement, minimal backlash, and extended service life under load. The 4.12 gear ratio provides 4.12 revolutions of the ring gear for every single pinion revolution, enhancing traction control in low-traction environments. Constructed from quality steel, it is designed to withstand the rigors of both street and off-road use without premature wear.

Professional mechanics and experienced DIY builders will appreciate the installation requirements, as proper differential service and understanding of gear mesh setup are necessary. This gear set is specifically compatible with 8.8-inch and 9-inch Ford differentials, ensuring a reliable fit for those applications. With its robust design, it is an excellent choice for those looking to enhance their vehicle's performance.