I had some issues with this last weekend. Up until then I hadn't been doing much driving in the mountains on forest roads, and hadn't been up there yet with my 33" tires. Additionally the dealer reflashed my Jeep for the J31 recall in December.
I was getting the Hot Oil light in 2WD, 4H and 4L. So it can happen anytime. Normally it clears itself, but it sounds like you are having issues.
Like many others, I am going to spend the money and install the aftermarket transmission cooler. Do a search and see the pics of how a Jeep can burn up if the oil actually does overflow.
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