Built 4L60E shift pressure inconsistent
#1
Built 4L60E shift pressure inconsistent
My built 4L60E shift pressure "shift" is inconsistent feeling, one shift it feels good and the next at approx same RPM/speed it will feel a little soft or to hard, why is this and what can I do to get the same feeling and a more consistent shift?
#2
Moderator
Hook up a pressure gauge to the trans while driving and also log the commanded PCS current which adjusts the line pressure. Very likely the PCM is commanding different line pressures at different times. If confirmed, determine why that is and don't blame the trans.
#4
Moderator
Erratic MAF or TPS values could cause the PCM to command differently.
Or, the command might be consistent, but the PCS in the trans could be flaky.
Logging/watching the commanded PCS current will help you determine which it is.
Or, the command might be consistent, but the PCS in the trans could be flaky.
Logging/watching the commanded PCS current will help you determine which it is.