Here is a short youtube video of the drive southbound on I-75 out of Jellico, TN:
I-75 Southbound out of Jellico, TNThe grade is roughly an average of 2.8% up from Jellico up to the highest point on the road. Jellico is at roughly 1100 ft in elevation, the high point is about 7 miles south at about 2100 ft. Not much to it at all, it's not even a mountain pass. Going on down to Caryville from the high point is even a more gentle grade. The road is great, we drove it going northbound last June in a MH towing a CRV.