2005 SE 3.0 w/84,800 miles. No CEL codes. Dealer baffled just giving me recommendations for more money, no answers. Several different things are randomly happening. When driving in stop and go traffic, (speeds slower than 20mph) the car sometimes start jerking slightly then the engine dies. Stop, put in park, start it up and everything fine. Also in traffic, when downshifting, the RPM goes up. One morning, started car, idling about 700, shifted to R, left foot off brake and the car shot out of the garage fast. Even with foot on brake, RPM's 2200+. In general say the last 5,000 miles driven, the tranny is taking longer to shift each time at a higher RPM. Any recommendations. I'm not mechanically inclined, so I do not know if these are all tranny related or not. Should I take to Tranny shop because dealership was no help.