Guys,
See the attached log at 1 minute 36 seconds into the log.
This is the 3-4 shift and right before it shifts and hits 4th the RPMs flare up about 300 RPM. I noticed this in the new TCM, also in the old one. The old one I have a log of it doing it on the 2-3 shift.
It only does it cold and I have only seen it do it cold leaving in the morning. It does not do it when I leave work in the afternoon, but I also don't take the same path obviously.
Anyone seen this before and have any recommendations? I know there is a TSB out there for fluid change (only 4400 miles on the truck) and also see others note some of the adaptive features may have learned something wrong. Not sure if a reset and fast learn would be helpful. I did do a fast learn after the TCM swap and new tune.
Scratch that, log won't load. Not sure if it is too big or what but I will try again or look for another. I did load some screen shots.