My Dexron ATF quart has grown cobwebs. Until now (well, sorta "now").
A couple of months ago I noticed a "squeal" that disappeared after a mile or so, but the PS worked normally. Upon getting home, I checked various and finally the PS reservoir, which was quite low.
Uh-Oh ...
Filled it (only took "a bit"), and I checked the pump, rack, and boots, and all were dry, and even placed a piece of cardboard under it overnight, then ran the engine and turned the wheel back and forth - no drops and no squeal.

I am guessing perhaps 700-1,000 miles later ...
Flash to yesterday - the same thing happened and I followed the same procedure as before. Squeal stopped when fluid added, but I did not investigate further (snow falling and too darn cold).
Ideas? I don't think anyone has reported similar before.
Thanks,
Tom M.