I had my drivers seat reuppolstered and when it was replaced it had too much play in the gear railing. They got another seat which did not have excessive play but when put it it too had excessive play. Is there some trick to replacing a Durango power seat without getting excessive play?
Are you personally installing these seats or are they being professionally installed?
It might be because the car/used seats are 11 years old. There will be some play also known as wear & tear.