Just noticed wife's caravan puked coolant out the overflow, she couldn't confirm it was overheating while she was driving-most likely it was....(lost abt 8-10oz.) still above add mark. Before i go over it tomorrow, could there be any connection with a transmission fluid/filter change i did yesterday?

The reason i ask, the transmission has a harsh downshift [abt 30mph] I attribute to the computer relearning the fluid change, also getting a 1648 code [batt. disconnect]........can't figure there's a connection but i have to ask.

Thanks
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update: Ran engine till fans kicked on, all seems normal. Went for a 8 mile test drive, temp gauge stayed normal whole time. After shut down i watch reservoir level go from a little over max back to mid range of add/max. Beats me........