I'm tuning my 2003 Escalade ESV, the AWD model with the 6.0 LQ9 and (I'm told) 4L65E transmission. (Note - in VCM Editor it shows up as a 4L60E, I assume this is normal?)
Anyway, it seems that no matter what we try, the upshifts are very slow for 1-2 and 2-3, around 0.9-1.0 seconds with the best tune so far. Downshifts seem to come on much firmer though.
Engine torque management is removed, shift timing is set about 25% of stock, line pressure at 96 psi (too high??), and have tried anything from 50% of trans torque management removed to adding more than stock. Best feel seems to be with 50% of TTM removed but still slow upshifts.
What might we be missing that would delay the shifts like this? Is this something that can be tuned out, or does it point to a mechanical issue? Or maybe the Cadillac valve body is set up mechanically for soft shifting?
The truck does have about 150K miles on it, and I don't have a good maintenance history on it. Draining and refilling the trans fluid, maybe a couple times, is my next step but if there is something else I should do while I'm under there, it'd be good to know.
Any assistance is appreciated.
See attached tune for more details.