Since my long and wandering post about the 4L60E got me nowhere, I'll ask directly: Is there a way in the V6 HPtuners software to change shift pressure?
It would seem that you can affect it indirectly via the 'shift time' adjustment, but since there's no input speed sensor on the 4L60E (which apparently there is on the 4T65) is there any way to directly affect shift line presure?
I guess I can play with torque management and tell the PCM that there's more torque happening than there is really, but that would make small throttle shifts very harsh.
Another quote: "The 4L60 shift line pressure and
torque management are whatever they are calibrated to be, and the shift
time that results is the shift time - an output, not an input, is what I am
saying here. "
I get what the transmission guys call a 'slide-bump' on the light throttle 1-2 upshift. It goes away completely at more than 12% throttle and the shifts there are crisp but not jerky.
My force motor settings start at 670 and fall from there, so I guess I'll just subtract 9-10% from the first three rows globally and see how it does.
Full throttle shifts are nicely firm, but still not tire chirpingly hard. Could just be that my 90k transmission is tired, also. If I need to rebuild it it'll be to V8 specs + light valving changes.
As ever, yay HPTuners!
-Anton