So I have yet another weird new issue popping up I have a 1999 disco 2 210000 miles its a great running truck. I have bean getting an intermittent trans over temp light all fluids are good and full. Two days ago i was cruising down the interstate at 75 mph and the trans temp light came on after about 20 miles, I kept driving and went to pass a semi and as soon as the truck downshifted and accelerated to about 77 the light flickered and went out as soon as I was around the semi and the truck shifted back up and i slowed to 75 the light flickered and came back on so i messed with it for about 45 miles and continued the same pattern. the next day made the same drive and same thing the light came on after about 20 miles and flickered off every time it downshifted and sped up and flickered off every time it up shifted and slowed to 75????