4l80e 2nd to 3rd gear shift ... help needed!!
4l80e 2nd to 3rd gear shift ... help needed!! got a brand new trans and converter put in and the 2nd to 3rd gear shift is fighting each other . it shifts to 3rd then to 2nd then to 3rd only while partial throttle like anything under 3/4 or less basically . any ideas?
My 1st guess is the tune. Was this in and working before, and you just rebuilt it, or is this in a swap, and it was just done? Does the tune have a segment swap? Need more info.