Shaking in the gear box at around 50 miles an hour on 2005 Audi S4

Audi says nothing is wrong, one mechanic said its the bearings. Does anyone at Audi know anything about their cars.

Asked by for the 2005 Audi S4
When you say "shaking in the gearbox", do you mean that the steering wheel is shaking? Have you had the wheel balance checked?
car was aligned and wheels balanced shaking is in gear shifter