flickering in gears

hi friends 607 v6 2.7 hdi automatic knocking in the gearshifts in my car so if the car eats veteran after the gear shifts, I changed the gearbox oil, there is nothing that can change why please

First of all, welcome, Mustafa Bey, this kind of problems in automatic transmissions is very common in Peugeot series. the shampoo oil has changed, so I connected it to the master computer and saw any malfunction. usually the brake sensor change can occur until the cellonoid valve change.