I have this "pump", and have somewhat abused it. I believe it says in the instructions for oil use only.
I have used this for transmission fluid and front diff fluid on my Ecoboost f150. It has been used to extract and refill, and it's much better than using the hand pump you put on top of the one quart bottles. My f150 only has a short dipstick on the transmission case under the truck, so it really helps for me, and the front diff drain plug is impossible to get to without dropping some parts on the front end.
The downsides of this pump. Must be hooked up to a battery source as it has two clamps that you put on the positive and negative of a better terminal. I personally use my HF battery jump pack and it works well. One problem I have with this pump, probably from my abuse, is it leaks whatever fluid I'm extracting from the breather holes on the yellow part of the motor body. Probably about 10 drops Everytime I use it.
What should you take away front my reply? If you need something too move fluids around quickly in tight spots, this may do well for you if the price is to your liking. I think the price was around $15. I hate using the hand pump, so this works well for my need.