The Mini Maxx center differential absorbs driveline shocks to improve durability and distribute power evenly for maximum acceleration. The differential includes a factory-installed 47-tooth, 32-pitch, spur gear. 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.