Revolution Gear & Axle D44-488TD 4.88 Ratio Thick Dual-Drilled Ring & Pinion

Vehicle Fitment

• Fits vehicles equipped with a Dana 44 standard-rotation differential - verify axle housing code, pinion spline count and ring-gear bolt pattern before installation.

Features

• 4.88 :1 gear ratio engineered for Dana 44 axle housings to restore performance when oversized tires or heavy loads are used.
• "Thick" ring gear design with dual-drilled bolt pattern (3/8" & 7/16") to enhance durability and broaden fitment in 10-bolt covers.
• Produced from heat-treated 8620 steel for superior strength and long life.
• Precision gear cutting and lapping for smoother engagement, reduced noise and improved gear life.
• Designed to improve mechanical leverage and torque delivery under off-road, heavy-load or large-tyre conditions.
• Maintains highway drivability when matched properly to tyres and gear ratio selection.
• Covered by a 2-year limited warranty for defects in materials and workmanship.
• Installation ready for experienced gear installer - correct preload, backlash and gear pattern setup required for optimal performance.

Specifications

• Gear ratio: 4.88 :1
• Differential type: Dana 44, standard-rotation
• Pinion spline count: 26 splines
• Ring gear diameter: 8.5 inch
• Ring gear bolt thread pattern: dual-drilled compatible with 10 bolts (3/8" & 7/16")
• Material: 8620 heat-treated steel
• Carrier break compatibility: for 3.73/3.92 ratio housings (verify your carrier before use)

Included Components

• 1x ring & pinion gear set (part number D44-488TD)
• Note: Ring gear bolts, bearing kit, seals and gaskets are not included unless specified as part of a full kit - verify contents before purchase.

Product Description

The Revolution Gear & Axle D44-488TD ring & pinion set provides a high-performance 4.88:1 gear ratio upgrade for vehicles using a Dana 44 standard-rotation axle. With a thick dual-drilled ring gear design and high-quality 8620 heat-treated steel construction, this gear set is built for heavy load, large tyre or off-road applications where stock gearing no longer matches the demands. Its precision manufacturing ensures smooth engagement and long service life, while the dual-drilled bolt pattern offers added fitment flexibility in 10-bolt housings.

Ideal for trucks, SUVs and 4x4 rigs with Dana 44 rear axles wanting improved torque delivery and driveline response when using oversized tyres, heavier loads or off-road terrain. Because the gear set is not tailored to a single vehicle make/model but rather to a specific axle housing, correct fitment verification is critical: confirm your axle housing code, pinion spline count, ring-gear bolt pattern, rotation type and carrier break before installation. Professional gear setup including preload, backlash and pattern check is highly recommended. Ring gear bolts, bearings and seals must be sourced separately unless full kit is confirmed.