This Front or Rear Diff Set provides a pre-assembled replacement unit for servicing your vehicle. Gear Profile 5.Features:Factory assembled and filled with 10k cSt silicone oil for fast and efficient servicing - Tough steel internal gears for long-lasting durability in all conditions - Strong composite diff case -  42T GP5 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 rubber-shielded bearings for fast and efficient fit to your vehicleIncludes:1 x Factory Assembled Front or Rear Diff, 42T GP5 (gear profile) Steel Straight Cut Main Gear and 10k cSt Silicone OilRequires:Must be used with #ARA311016