2003 Chevrolet Impala Q&A

2003 Chevrolet Impala Question: What sifting problems that can be fixed without replacing transmission?

Sifting problems, when accelerating will jerk. Seems worse on inclines, on straight stretch will shift if I let off gas pedal, seems to be stuck in 3rd gear now. Also ABS & traction off lights are on & when starting the service traction system warning comes on. Changed transmission fluid & filter a week ago. -
Answer 1
Scan test of ALL modules needed! ......To be done by a mechanic....parts store cant do this.... -