Help with shift issues with my 6.0, 4L60 , swapped 73 international Scout. Everything works great and all the shift points are normal when I start driving, then after 10-30 miles, the shift points get real aggressive and it holds the gears for and extended period. It does not appear to be temp related, but maybe? I have done very little to the tune, from a 2500 6.0.
I originally thought it may be due to the fact i went form a 60 to and 80, it is changed in the tune file. But it shifts just fine most of the time?

Any info would be great, I think I attached the tune.