So guyz with 4-tec velineon system can you check your models and tell me do you experience the sam thing. So the gearing is perfectly aligned;

After a run this is what it looks like

As you can see the pinion is pusing the center drive shaft towards the back differential housing. This makes the spur get out of the bering and displace the mesh..

after inspecting this is what i find on the spur. Slight rubbing on the chassis,

Tried with a new spur and pinion, tried with a new center drife shaft both alum and steel. Still the same. Inspected both differentials, shafts are straight. its drivign me nuts. Can anybody give an idea how to solve this or whats happeing ?