4.86 Mod Rear w/o Tubes Pro Series

The 4.86 Mod Rear without Tubes Pro Series by DIVERSIFIED MACHINE is a purpose-built differential assembly designed for serious off-road and high-performance truck builds where extreme gear reduction is essential. Built for drivers who demand maximum torque multiplication and crawling ability on technical terrain, this modular rear axle delivers the low-end grunt needed for extreme wheeling, rock crawling, and low-speed trail navigation. The Pro Series designation indicates this is a premium offering within DIVERSIFIED MACHINE's lineup, engineered for durability under sustained aggressive use where standard ratios simply won't suffice.

This modular differential features a 4.86:1 gear ratio, one of the most aggressive ratios available for street-capable applications, providing exceptional mechanical advantage for climbing steep grades and pulling heavy loads. The "without Tubes" construction indicates this is a bare housing or spool-type design, allowing builders to customize with their choice of differential internals, lockers, or spools based on specific application requirements. Manufactured to exacting tolerances by DIVERSIFIED MACHINE—a recognized leader in quality fabricated axle components—the Pro Series construction utilizes premium materials and processes to withstand the intense shear loads generated by extreme low-range driving, rock crawling, and high-torque engine combinations.

This rear assembly is ideal for dedicated off-road trucks, ultra4 competition vehicles, and extreme crawlers where ratio flexibility and modular design are non-negotiable. Installation requires proper axle shaft fitment, brake component adaptation, and professional assembly to ensure correct bearing preload and backlash settings. Weighing 91.33 lbs, builders should verify compatibility with their frame, suspension geometry, and driveline components before purchase, as this aggressive ratio demands a drivetrain engineered to handle the resulting torque multiplication and reduced top-end speed characteristics inherent to such extreme gearing.