Take the radiator out to the shop who did it. They should be able to fix it. Tell them about your over heating problem too. Don't drive the car until the leak is fixed. Hopefully it is only on way and you are not getting coolant in your trans.

Pull your tranny dip stick make sure it is not foamy pink in there like a milkshake. Water can damage the clutches really fast

Allen Here's a novel idea, let's not throw a bunch of parts at the car hoping it will fix the problem and instead spend a little time diagnosing it first. Life was a little easier when I was just a wrench.