Need coolant leak help

My 2013 JKU is slowly losing coolant and I cannot find the leak. About 1 month ago, I did discover that my radiator was leaking. There was a noticeable fast drip coming from the radiator everyday when I got home from work. 

I ordered a new Mopar radiator and installed it. I no longer see any leaks coming from the radiator, not even dried up coolant anywhere on the new radiator. 

I also climbed under the hood to examine the oil cooler and I do not see any signs of coolant around the oil cooler or under it. 

I crawled under my Jeep and I found droplets of coolant on the transfer case skid plate. But I do not see any signs of coolant right above the transfer case.