1968 GMC Suburban Differential Carrier K25/K2500 Suburban - Yukon Dura Grip positraction - Dana 60 - 30 spline - Full Float Axle - 4.10 and Down Ratio or Thick Gears - Rear guaranteed to replace your current 1968 GMC Suburban Differential Carrier K25/K2500 Suburban - Yukon Dura Grip positraction - Dana 60 - 30 spline - Full Float Axle - 4.10 and Down Ratio or Thick Gears - Rear. 1968 GMC Suburban Differential Carrier comes new OEM 1968 GMC Suburban Differential Carrier aftermarket new 1968 GMC Suburban Differential Carrier of remanufactured 1968 GMC Suburban Differential Carrier K25/K2500 Suburban - Yukon Dura Grip positraction - Dana 60 - 30 spline - Full Float Axle - 4.10 and Down Ratio or Thick Gears - Rear.