R8 V10 FL type 42 with defective front axle gearbox, help with KH tuning, what now?

After a detour to Italy I suddenly had quiet, but clearly audible “storage noises, unaltered also after inserting the idling. With a distance of approx. 1000 kilometers back from Italy (except tank breaks) last a little louder Gräusche. Tuesday call KH Tuning, should come by despite booked out date. Thanks KH Tuning !!!! You have helped me so often!! Thank you that you are there!! Yesterday on Wednesday after a long time due to overcrowded A3 in Engel Skirchen arrived, boss takes over my R8 V10 type 42 FL with 62000 kilometers to the test drive and comes back felt after 20 seconds: running noise front wheel gearbox (Haldex?). Despite missing appointment and upcoming ride to Passau expansion of the entire transmission combi (front axle gear / drive shaft / cardan shaft) by KH Tuning! Now I have a „RWD, somehow clearly „spritziger Questions: – did you have this problem before?? – would like to get the original condition, but what cost? – what would you do? – KH Tuning will disassemble the gearbox, will take some time (are booked out on schedule!) – any experience (is enough type 42-iger or synchro problem children) Thanks for additional tips or info`s!