The transmission on these things is Electronic controlled. No vacuum lines that I am aware of anyway.
Slamming through gears, sticky somethings in side the transmission. Why Sticky.
Clue: you U just had it serviced.
Buy who or whom, was the filter changed? How was it serviced, there are different ways to do it.
was the correct fluid used,
Depending on who serviced the transmission, was it really serviced?
Yuh, I'm annal that way.
The wrong fluid can make things sticky.
Transmission fix it in a can has the capability of making things sticky.
Mine got a tad sticky after sitting in the drive way for 3 years.
After 6 months of quasi regular driving, it is back to not as smooth as silk, but it never was and it would scare me if it got that way.