slow to climb hill especially when you make a stop on 2000 Nissan Pathfinder

the car drags before the gear changes. i was asked to change the shift cyleniod switch but now i have to accelarate full when i stop on a hill before the car can move. and it vibrate whilst it move up the hill and stops when it finish climbing. can you please advice what to do next

1 answer
Check the codes and data stream in your trans computer to find out the real problem. Other wise your are just guessing, which can be non-productive and very expensive.