Sunset01

I've got a locally fresh built up 4l60e that runs great. I frequently get it short shifting 2-3. I've got fairly well tuned transmission tables, part throttle and WOT settings. All other behavior seems good. Now, I took the path of having the WOT mph settings WAY low (10/20/30) to have rpm govern, at least initially. Set that way, I would shift around 6100rpm with a 6400rpm setting. I then set mph up to be equivalent to the rpm setting (including part throttle at higher tps), with a 6300 rpm shift, kind of assuming that if it starts to work right, you have to set rpm a bit lower than where you really want to shift. My first two WOT 2nd shifted at 5850 and 6000rpm. (easily noticeable when happening and logged with Ease). I then tried two more runs a few minutes later and got what I was supposed to ~6350, maybe a hair more. I have to test more to see if the first 2 were a fluke. But just maybe the pcm does something a bit more complicated than 'must meet rpm & mph' ....... Any experience or help? I'll report back with more testing.

samz28

i'd like to know too, did you set all "modes" to that rpm of shift?

Sunset01

All tables except the one that comes with the 2xx mph stock. Also, I always have part throttle, top few tps settings at the equiv. mph of where I want wot shift, even when the front page was set to 10/20/30mph. I'd love to know how the 100% tps part throttle table relates to the front- seems duplicative....