1) I suppose I did, came to about 3/4s of the way to overheating a couple of times while trying to make my way home.
2) I will be taking a look at the fluid later today. I don't think it'd be burnt, but of course it doesn't help to check.
3) All symptoms check out. I was hoping it was the j-mod, but apparently (have this thread x-posted on other forums) somebody said they messed around with the repair receipt in photoshop and found this to be on there:
"The transmission was rebuilt in June 2015 by installing a "Banner" kit, a re-manufactured torque converter, and a TransGo HD2 valve body reprogramming kit.
Parts were $500, transmission fluid $68, labor $780.88, and tax $51.12.
Warranty is 90 days or 4000 miles, whichever occurs first."
Banner kit it is, ****. Seller told me he had that receipt for a transmission rebuild with 3.73 gears, but it was unreadable time and it was before he bought it, so he likely had no idea what else work was done.