Uh, yeah. So the good news is, I figured out where my coolant went. The bad news is, it apparently leaked through a leak in the core. The bottom left corner was leaking...though in a strange way (sometimes it would drop quite a bit, and sometimes not very much). Since I'm on the road, and on a time crunch, I talked to Freightliner about adding some Leak Stop. I did add 2.5 bottles of Bar's Leaks, and it appears that I may have solved the leak...at least enough to get home!
As for why it took so much fluid from being barely below the minimum line: apparently the way the tank is designed, fluid will actually show up on the shelf just below the minimum line, even when the main part of the surge tank has quite a bit less in it. Once I started to see how it worked, I was able to tell if it was low on coolant. Kinda fools you at first!
Keeping my fingers crossed that it doesn't leak any more...and if so, I've got a few extra gallons of coolant on hand to pour in.
Thanks for all the help!
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