1998 Ford Windstar - Oil in the coolant.

radiator, it could be tranny fluid.

If its not the rad , you should have it pressure tested for a bad head gasket.Those vans are common for it.Make sure you check your oil for engine coolant, if there is any you can damage the crank bearings.

1998 eddie b. 4-wheel drive lights flash on off and sometimes nothing and 4-wheel will not go in

you either have a blown head gasket of a cracked head. good luck! I hope you can do it your self because that is expensive! if its just the gasket it would cost about $600 and if its a craked head then its gonna cost about $1000 to fix! If it is just a blown gasket i recomend spending $15 and buying liquid glass. you just put it in your oil and run the vehicle for about six hours and it will not leak again it will be a pain taking it off if you ever have to but its worth it not to have to take it off yourself or take it to the garage! hope you get it working again,good luck!