2 fold question. I had my tranny on my 03 forester changed a couple months ago. Recently the A/T temp light has been flashing and now it appears to be accompanied by grinding sound while driving

I had my tranny in my 03 automatic forester replaced about 6 mos ago. Recently the A/T temp light started flashing and now it seems to be accompanied by a grinding sound while driving. When I looked under the hood there also appears to be a big leak in the radiator. I am on a limited income so trying to pin point which is the most pressing repair. I check all my fluids regularly A/T fluid, Oil, coolant and they are all at appropriate levels so I'm a bit stumped. Any help is appreciated.