The all-metal Mini Maxx center differential absorbs driveline shocks to improve durability and distribute power evenly for maximum acceleration. The differential features a 47-tooth, 32-pitch, steel spur gear and aluminum housing for ultimate durability. The sealed differential comes pre-loaded with silicone oil to help prevent unloading and ballooning of the front tires. Note: When installing the center differential, you must replace the standard driveshaft with a shorter 10757-series driveshaft and add the 10762 differential pinion gear.