even if it were possible, i dont think resetting an auto box will fix your problem.
auto's work on pressures, so if your oil is thinner than usual (worn out & old), it will read pressures lower at certain rpm. so it will still have higher gear changes.
do a search in the drivetrain and transmission section and you'll find a guide on how to change/clean the existing oil and filter (the filters are steel mesh so you can clean them instead of replacing them.