USA Standard Ring and Pinion gear set for Toyota 8 inch in a 3.90 ratio. USA Standard ring and pinion sets are the right choice to add confidence to your install. USA Standard Gear offers a full line of ring and pinion sets for a variety of common and hard to find applications. USA standard gear offers a standard one year warranty against defects on their ring and pinion sets Technical Notes: This gear set has a 29 Spline Pinion. Please verify your pinion spline count prior to purchase. Must use pinion nut part number Ysppn-025 Features and Benefits: All USA Standard Ring and Pinion Gear Sets come with a standard one year warranty against manufacturing defects. Proven manufacturing technologies provide top quality products Ring and Pinion gears from USA Standard ensure affordable reliability as general OE replacement gear Details: AAP_UDA_4: 70 Fitment Notes: Toyota 8 inch.; 3.90 Ratio; 8 inch. Ring Gear Diameter 29 spline pinion Application Summary: 1984-1995 Toyota 4Runner (Rear, Front) (Drive: 4WD / Note: Toyota 8 inch. 3.90 Ratio 8 inch. Ring Gear Diameter, 29 spline pinion) 1979-1995 Toyota Pickup (Rear, Front) (Drive: 4WD / Note: Toyota 8 inch. 3.90 Ratio 8 inch. Ring Gear Diameter, 29 spline pinion)