Replacement of Fluids: Before or After Storage?

Drain and refill coolant , empty fuel tanks, or add fuel preservative, change oil and trans oil after storage, before startup.

 

I disagree with the above. This thread is likely to be a discussion of reasons and you can make your own decision. You're not likely to find out much now that you didn't already see in the search you mentioned...

Change any lubricants you're inclined to change (especially the engine oil) before storage. Engine oil becomes acidic in use, so you wouldn't want to leave it sitting in the car for an extra 6 months. So do start & run the car after the oil change to dilute the old oil that was clinging to engine parts, etc. Come spring time, the first time you run the car you'll evaporate any condensation that may have gathered over the winter and motor oil won't degrade just sitting in the crankcase.
Brake fluid is probably best changed in the spring to purge any water that it may have been able to absorb before use.
Oh, and change the washer fluid in the spring, too! You wouldn't want all that stuff to evaporate on you over the winter!