I was having lots of trans problems, stacked shifts, and overall bad performance with my updated spartan tunes 250, 275, 310...
I finally gave up on spartan tunes and what i consider poor service.
I decided to try mikes tunes from kem. Man what a difference, all of my trans problems are gone. The truck shifts great, pulls harder, its snappier and the trans is not binding anymore. It even idles better. I cant say enough about kems tunes.
If you guys are having problems like was try kems tunes. Ill never go back to spartan tunes.