pcmhacking.net

Hello guys
I have P59 TBC setup and interesting in TBW conversion IF it will bring me revving up automatically when AT downshifting
Is there any algo in software to make it ?
I have done overrun mod to my tranny(4l60e) and now overrun stays always on at 1-3 so now engine always connected to wheels and with downshifting at light braking I achieve some jerking when tranny engaged 3-2-1
Its not big problem actually but if P59 can revs up RPM to match lower gears it will be great

The p59 does not have any provision for rev matching, unfortunately. Have you tried disabling shift lock on the TCC? You would likely still get some jerking on manual downshifts, but maybe not as bad? I suppose you may also have some luck playing with line pressures during downshift, but that is not something I have ever had reason to try.

TCC lock up works only at 4th because I cant make 3-4 smooth with locked (and with unlock when shift option it even worse cause it kicks -unlocks-locks)
When you're downshifting with forward sprag worked as should its just slides when your engine speed not match veh speed
With overrun mod (sprag always locked by overrun clutches) you start braking with engine too
Its not that bad -but definitely feels when you braking slowly