2008 Q7 transmision deffective

[pasbogdan]

At very low speed,just when the car starts to move,with steering wheel to full lock to one side car seems to act like a center diff that is locked(tires slipping)Changed the oil in the transfer box and i found it black.Any experiences with this kind of horrible van?
Can see no play in driveshafts.

[V6quattro]

Are the tires the same diameter? I once had shaking/vibrating/shake problems when 2 new and 2 worn tires was fitted.

[pasbogdan]

The same all 4.They are winter tires.Same problem with summer tires.

[Monkeymagic]

Is a q7 proper 4wd drive or haldex?

[pasbogdan]

https://personel.omu.edu.tr/docs/ders_dokumanlari/891_13304_1913.pdf

It is like my '91 Nissan Patrol
But wit torque bias center diff inside transfer box.

[Monkeymagic]

I would suggest it's normal high steering angles causing the rear wheels to push forward when the fronts are travelling slower