This F/R Diff Set provides a pre-assembled replacement unit for servicing your vehicleFeatures:Factory assembled and filled with 7k cSt silicone oil for fast and efficient servicing - Tough steel internal gears for long-lasting durability in all conditions - Strong composite diff case -  43T straight cut steel main gear for increased durability under extreme loads - Metal cross-shafts and inserts for increased efficiency of fit and long-lasting durability - Includes bearings for fast and efficient fit to your vehicleIncludes:1 x Factory Assembled Front or Rear Diff, 43T Steel Straight Cut Main Gear and 7k cSt Silicone Oil