Ticks after gear oil change/brake belt adjustment

Moin, I changed the ATF yesterday with my Omega A C20NE and set the brake band (5NM+4 turns back) (by the way great that you need a 7/64 inch inner edge for this ) No bigger chunks on the magnet, only the normal abrasion slime, transmission so far OK! Today I did a bigger test drive and noticed that the gearbox is in idle mode, without driving stage, slightly growling. If you go on D, eats then. When driving normally everything is OK, but at m Kickdown he turns up without having grip…! Now I have thought that actually the only place that seemed to me when I assembled Spanish was the lid of the brake belt adjustment mechanism, where practically 2 seals lie on top of each other. The metal seal, which at the same time also seals the housing cover and the cardboard seal of the brake belt servo. Can it be of the symptoms that he loses pressure during the kickdown or so…??? Would you like to hear a few opinions…! D anke