SKU: DET913A477
MPN: 913A477
The Detroit Truetrac - Ford 9.75 34-Spline is a performance limited-slip differential designed for serious truck and SUV enthusiasts who demand both daily drivability and track-capable handling. Built by Detroit Locker-Tractech, one of the industry's most trusted names in differential technology, this unit replaces your factory open differential to deliver consistent power delivery to both rear wheels under acceleration, cornering, and load transfer. Whether you're upgrading a performance truck, improving off-road traction, or seeking predictable handling characteristics for a modified Ford platform, the Truetrac delivers superior performance without the harshness of a full locker.
This unit features a helical gear design that automatically biases torque to the wheel with the most traction, eliminating the inside-wheel spin inherent to open differentials while maintaining smooth, seamless transitions during normal driving and cornering. The 34-spline configuration matches Ford's 9.75-inch axle specifications, ensuring precise fitment and optimal load distribution across the carrier. With a compact footprint measuring 10.6 x 10.5 x 11 inches and a manageable weight of 39.55 lbs, installation is straightforward for experienced mechanics, requiring standard differential fluid and proper setup procedures to achieve rated performance and longevity.
The Detroit Truetrac - Ford 9.75 34-Spline is ideal for owners of Ford Super Duty trucks, Broncos, Expeditions, and other vehicles equipped with the 9.75-inch rear axle who want improved acceleration response, reduced wheel hop, and better weight transfer without sacrificing daily comfort. Installation should be performed by a qualified technician familiar with differential service procedures, as proper bearing preload, backlash adjustment, and fluid fill are critical to performance and durability. This differential is compatible with standard Ford axle shafts and housing, making it a direct upgrade that maximizes traction for both street and off-road applications.
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