Motive Gear MGK-502 Differential Ring & Pinion Rebuild Bearing Kit For Toyota 8.0" 4-Cylinder Ratio 4.88, 10-Bolt 27 Spline 8 Pinion & 39 Ring Tooth - Fits Toyota 4Runner Replaces REV-TOY-4CYL-488-K

Short Summary: The Motive Gear MGK-502 Ring and Pinion Set with Install Kit is designed for Toyota 8.0" 4-cylinder front and rear axles. With a 4.88 ratio, it's perfect for lifted trucks running larger tires, delivering increased torque and improved off-road performance.Key FeaturesApplication: Toyota 8.0" 4-Cylinder (Front & Rear)Gear Ratio: 4.88Pinion Teeth: 8Ring Gear Teeth: 39Pinion Shaft Diameter: 1.378 InchPinion Spline Count: 27Ring Gear OD: 7.8 InchRing Gear Bolt Count: 10Rotation: StandardMaterial: 8620 SteelIncludes: Ring & Pinion + Koyo Bearings, Seal, Nut, Shims, Marking CompoundWarranty: 1 Year or 50,000 MilesVehicle CompatibilityToyota1979–1985 Toyota Pickup (with 4-cylinder engine)1984–1985 Toyota 4Runner (with 4-cylinder engine)Replaces OEM & Aftermarket Part NumbersRevolution Gear & Axle: REV-TOY-4CYL-488-KWarranty & Quality Assurance Motive Gear’s ring and pinion sets are engineered with premium 8620 steel and precision manufacturing for unmatched durability and performance. Each set is backed by a 1-year or 50,000-mile warranty and includes a complete Koyo install kit for worry-free installation.

• 4.88 Gear Ratio for Toyota 8" Axles – Optimized for off-road torque and low-end power, ideal for lifted Toyota pickups and 4Runners with larger tires.
• Fits 1979–1985 Toyota Pickup & 1984–1985 Toyota 4Runner – Compatible with front and rear Toyota 8.0" 4-cylinder axle housings; requires 3.90+ carrier.
• Durable 8620 Steel Ring & Pinion Construction – Features 39-tooth ring gear and 8-tooth pinion, with 27-spline pinion shaft and 10 ring gear bolts.
• Includes Complete Install Kit with Bearings – Packaged with Koyo carrier and pinion bearings, seal, nut, shims, and marking compound for a full rebuild.
• Motive Gear Performance & Reliability – Backed by a 1-year/50,000-mile warranty; ideal for trail, rock-crawling, and overland applications.