Sorry for late Jump In. The AXIO Has k310 CVT Transmission And doesnt had Any CVTF Fluid cooler tube inside the Radiator.
If the CVTF Is mixing with the coolant you should immediately stop driving the vehicle and open up the TRANSMISSION MOUNT OIL COOLER it is installed on the side of the transmission and is in round shape and has 2 coolant lines in it.
The K310 does faces this coolant leakage problem in the oil cooler if for longer period of time the coolant is replace with plain water which causes the sulphate deposits in the oil cooler and hence results in oil leaking into the coolant.
STOP USING THE VEHICLE IMMEDIATELY AND OPEN THE COOLER UP AND REPLACE IT ASAP OR THE TRANSMISSION DAMAGE IS IMMINENT ........
I SAY AGAIN STOP USING THE VEHICLE .......