1988 Ford F Series Trucks Differential Carrier F-350 - 4WD - Yukon Dura Grip Positraction - Dana 80 Rear - 35 spline - 4.10 and up ratios - Rear guaranteed to replace your current 1988 Ford F Series Trucks Differential Carrier F-350 - 4WD - Yukon Dura Grip Positraction - Dana 80 Rear - 35 spline - 4.10 and up ratios - Rear. 1988 Ford F Series Trucks Differential Carrier comes new OEM 1988 Ford F Series Trucks Differential Carrier aftermarket new 1988 Ford F Series Trucks Differential Carrier of remanufactured 1988 Ford F Series Trucks Differential Carrier F-350 - 4WD - Yukon Dura Grip Positraction - Dana 80 Rear - 35 spline - 4.10 and up ratios - Rear.