4l60 shifting problems
Hey s im a newb here, i just switched over from a stock ecm and amazon harness . I have an issue with 2nd gesr shifting...
I start from a stop 1-2 is fine but stays in 2nd revs to the moon i left off it shifts in 3 and 3-4 are fine... then down shift to pass someone 3-2 & 2-3 up shifts as it should
Didnt notice this before the fitech swap
56 f100 2000 5.3 4l60e
Hey Mike,
We'll assume you're using the Fitech ECM to control the transmission.
I have zero experience using or troubleshooting the transmission features of the system but the info in this page may be helpful: https://fitechefituning.com/fitech-efi-tuning-forum-2/topic/ultimate-ls-systems-700xx-information/?part=4#postid-5607
Update... i drove it today.. if i put it in D its prrfect 1-3 if i put it in od it has the 2-3 shift problem