First off I would suggest a trans fluid and filter change and see where you go from there. I know that when my trans is cold that it takes longer to shift up and is slightly firmer than normal. Vacuum leaks will give you rough running and shifting problems so trace out all the vacuum leads and see what you find. My cruise control works but the car is slightly jerky when the car is attempting to maintain speed, apparently a new amplifier will sort this out. Good luck.