Emptied wrong fluid on 1990 Toyota Corolla during oil change, don't know

mygenerat1on

New member
what fluid I emptied.? While performing an oil change, I unscrewed what I though was the screw for enptying the oil in the car. Afterwards, I knew I should have emptied the nut that recquired a ratchet to open, but instead, I had unscrewed a nut that required a large allen key. When I took off the allen key screw-thing, a little bit of fluid, that looked like darker engine oil poured out, only not even a cup worth though. When I drove it later, after I managed to perform the actual oil change, I noticed a kind of high pitched noise emitting from the engine when I accelerated. I can't find out what it was that I emptied from the car, I don't think it was engine oil. Please help. I can't drive my car until I find out what I emptied.
 
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