Hello;
most people here share the experience that in case of gearbox problems, going directly to ZF is the better way to go.
This might help(nearest avaliable):
ZF Friedrichshafen AG
Representative Office in Serbia
Omladinskih brigada 90 V, Airport City
11070 Belgrad
E-Mail:
milan.grujic@zf.co.rs
Telefon: +381 11 3533 580
Homepage:
ZF Friedrichshafen AG | Startseite | Antriebstechnik und Fahrwerktechnik