Vibrations in 5 and 6 gear, slips out of gear.

[Sidensjo]

Hi guys! I have a big problem with my Audi a4 8b 2.0 tdi 33000 km. It starts to vibrate from 1800rpm when i put load on engine in fifth and sixth gear. Sometimes when i drive it just looses all gears and nothing happens or sounds when i put in another gear and releeses the clutch. What could it be? Dmf? Splines on inner drive shaft?
Seeking help from you audi experts! :)

Regards // Viktor

[Sidensjo]

It feels just like when a driveshaft pops out from their splines but i've checked them and they seemed to be ok. Yesterday when i drove home from work it happend on the highway in 6 gear but before the car stopped it started pulling again! On the display the gear indicator suggested that a should change gear from 6-5 and then 5-4.

No error codes or just a slipping clutch.

If someone have some experience of theese symptoms i would certently appreciate if you could help me with this problem.