2015 6.7 tranny issue, shifted from 2nd to 6th hard

[naffan12]

Hey guys, got a 2015, 75k miles, d3leted, and currently running the Sp@rtan SOTF 500hp tune. The truck was warmed up and I took off from a dead stop and got on it a little and the truck shifted from 2nd straight to 6th very hard, then back to 2nd when I slowed down. I stopped and went again and it didn't have an issue, but now it's flaring slightly when it shifts from 4th to 5th. This is the first issue I've had with the truck, any ideas? Just a hiccup or potential major tranny issues? Thanks.

-Nathan

 

[6.7 Powerstroker]

did the tranny have time to relearn from the last tune you loaded?

 

[WHY NOT]

I would do a trans relearn on the truck and drive it for a bit and see if it clears up. It should clear its self in a couple hundred miles with normal driving if its ok

 

[naffan12]

Yeah I had put around 1,000 miles on it since the last time I switched tunes. That's why I was worried.

I loaded the Warhammer SOTF tune with the raised shift points and did a re-learn and it seems to of cleared up completely...Hasn't done it again. It sure did freak me out for a second though!