I just got my truck out the trans shop yesterday after a master rebuild and 3k stall install and a easton posi and a transgo HD 2 shift kit... the test drive went good after I got it out I installed the new tune I got from nelson for the stall and shift kit and this morning I floor it and it goes past 6k and it acts like it doesn't wanna shift to second but if I let up on the gas it'll finally shift could that be from the tune or is it something else it used to do the same thing when I had the hypertech....

 

if it worked fine before the tune, and shifted funny after the swap, load the other tune back on & see if the problems disappear. If so, get with Allen to see what's up.

 

the tune might have your shift points screwed up. check the tune.

 

well I sent the old tune back already...

 

talk to the guys at nelson. they should be able to help you.