Bruce Flesher

My trans just started to NOT shift into 3rd or 4th. I was cruising along with the cruise control on and all of a sudden the RPMs jumps up and I was decelerating. Once the engine hits a certain RPM like around 3200, it started to pull like passing gear. I slowed way down to 45. Gave it the gas and it would slip into second and I could accelerate. I'd like to this preface this by noting that I hardly drive this car. I store it in winter and drive it occasionally in the summer. There is only 77,000 miles on the car. I did notice some trans fluid under the car when I pulled it out after sitting since Oct. I checked the trans level and it was still pretty full. I added some trans stop leak. It wasn't to long after this that the trans would not shift into 3rd or 4th. That was about 2 weeks. In that time I only drove the car twice and put on about 240 miles. This morning I drove it and it shifted fine for about 15 miles and then started to lose the two gears. Could this be the solenoids or the clutch packs?