2006 Chrysler PT Cruiser Transmission

Engine light came on car went In to limp mode then down shifted to second, replaced input and output speed sensors, engine light went off and drove fine for three days, then same issue started again, thought maybe sensors were faulty so replaced them again and changed transmission fluid and new trans filter, engine light went off and drive fine for a few miles then same issue started again, pt will be fine at times for several miles then the park, reverse, neutral and drive lights in dash will start flashing, this is the heads up that it is going to go in limp mode then down shift into second, you can turn the car off at times wait a few minutes start the car and it will drive fine for awhile. I can also tell when I start the pt that it is going to shift fine for when I shift from park to drive it shifts smoothly, I know it is going to act up and be stuck in second when I start the pt and shift from park to drive for it shifts with a little jerk. I had the timing belt, tensioner kit, water pump and a value done in February, I spent all my savings having this repair work done. TIPM was replaced two years ago, at this point I can not take it to a repair shop due to it has drained my funds, need expert advice on this issue hoping it is something I can replace myself like I did the sensors. I do not think it is the transmission it's self for it shifts fine in all gears As I stated earlier before the P R N D lights start flashing goes into limp mode then stick in second. Thank You R.M.R.