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Since the light is coming on, I recommend that you have the computer scanned. If there is a diagnostic trouble code related to the transmission, it will point us in the right direction.
Here is a quick video that shows how it is done:
Now I realize most people don't own a scanner, but most parts stores will scan it for free. You should consider having that done,
Next, have you checked the transmission fluid condition and level? If the fluid is clean and full, this could be a pressure related issue. However, the scan would help identify that.
Check the fluid and if you can, scan the computer. Let me know what you find. Also, I'm questioning if the cog light you see is related to the traction control. Let me know what you find with the first couple checks.
Tuesday, March 26th, 2019 AT 5:27 PM