Trail Gear 5.29 Hi-Pinion 29-Spline Zip Air Locker

Assembled 29-Spline 3rd Members For Toyota 8 Axles Fully built 29-Spline 3rd members using all new parts and ready to drop into your axle. Third members feature top-quality high-strength 29-spline ring and pinion gears and your choice of lockers. V6 units feature larger OEM style V6 gear sets with the longer pinion gear. Each unit is set up with solid pinion spacers for long gear life. Trail-Safe 29-spline pinion seal provided at no extra charge. Quadruple-drilled flange covers most Pickup 4Runner and Tacoma driveshaft patterns. APPLICATION NOTE: Spool lockers should only be used in rear applications. Spools will be harder on axles than a selectable or automatic locker. Fully built 3rd members will not fit stock Tacoma or T100 axles. RING and PINION BREAK-IN PROCEDURE All new 3rd members require a break-in period to prevent damage from overheating. Any overloading or overheating during this period can cause the gear oil to break down resulting in ring and pinion failure. After installation, drive lightly for 20-30 minutes and then allow the diff to cool for at least two hours. Avoid heavy throttle use during the first 500 miles. Do not tow a trailer during the first 500 miles. Change oil after 500 miles to remove any particles suspended in the oil. This may seem unnecessary, but it is very easy to damage the differential by loading it before the gear set is completely run in. New ring and pinion gears create excess heat when they are new. This excess heat can damage the heat treatment of the gears.