diff according to the carrier manual is stamped next to the filler plug. Normal is 583 which is 35 gear teeth and 6 pinion teeth
There are 2 different ratios on a WOT2 rear axle. Either 6.83 to 1 or 6.8 to 1, it depends the number of teeth on the crown wheel and pinion.
6 teeth on pinion with 41 on crown wheel is 6.83 to 1
5 teeth on pinion with 34 on crown wheel is 6.8 to 1
this means if you put a carrier diff in a WOT2H it wil go max speed 82 km/h in stead of 70 km/h
6,83/5,83 *70 = 82,00 km/h
thanks to the Hoseman his assistance, problem solved