'01 Lesabre transmission problems

If I gradually give gas and accelerate slower, the car is fine. If I have to suddenly give gas while driving, the car starts jerking after that, everytime it changes gears from 1st to 2nd (as I speed up). The jerking goes away, after I turn the car off and turn it back on.
I don't usually accelerate fast but sometimes you have to go uphill, go around someone, etc. It's one thing if it was just inconvenient but I'm affraid something is wearing down and I don't want to cause more problems to my beloved Lesabre. I would appreciate any help and thank in advance.

Transmission may slip, shift harshly or erratically due to sediment in the pressure-control solenoid requiring replacement.
:puke:
Have the trans scanned for codes.

Will look into a new salenoid, thank you.