Originally Posted by FmrStrtracer
Have you flushed the cooling system?
The only path for oil into the radiator would be thru the trans cooler.
If you had a blown head gasket, cracked head or block, you would have coolant in the engine oil, not the other way around.
Drain the radiator, flush with a good coolant system cleaner, refill with straight water, drive, re-check for oil in the cooling system.
that's what I was thinking! I'm flushing it asap and putting an external trans cooler on and checking the trans fluid today.