For all of you wondering what this was. I found the failure with clutch problem I believe. First , the ZF transaxle first was sitting in one of the first Pagani Zonda supersports car. This car have a AMG V12 6.5 litre engine, give aprox 650 hp and the car weight is some 1400kg. This was to much for the small gearbox, and a new design gearbox was made for the car.
The input shaft was twistet 1/10 mm or so, not visible by the eye, but when I tried the disk it was hard to slide freely all way on the shaft. I grinded a little on the shaft spline, and on the spline on the disk. after some testing and grinding the disk moved freely all the way. Then two days to put all together the clutch worked as normal.