Hi, I just bought 1986 Dodge D250 with 5.2 litre (318ci) engine with manual transmission and RWD and I need to change all fluids. Does anyone know the engine oil capacity, transmission oil capacity, coolant capacity and differential oil capacity?

 

If you got lucky and an owners manual came with it, that will be in there. Usually, your engine will be either 5 or 6 quarts with filter. The transmission and differential you will fill until it runs out. 75W-90 for the rear end. Some transmissions used ATF and some used gear oil. That depends on what transmission you have. Do you have a sur-grip or open rear end? The sur-grip needs a friction mollifier to operate properly.