We had a 2005 4L60E converted to a 4L65E w/transgo & stock pressures.
It shifts close to stock for the most part but shows some differences under different conditions.

We are going to have a tuner dial it in. What options or conditions can he adjust? I just want to know what he is talking about when we discuss it.

 

shift times
torque management
all the shift points and whatnot
line pressures
tcc

 

Would shift times be the time in between gears, and line pressure be the firmness?