steering wheel shake and vibration in front floor driverside

can anyone tell me what could be wrong with my 05 impala,has a shake in the wheel from 80 km's to 110 km's anything over or under shes smooth,if i do 80 90 100 km's put the car in neutral the shake is gone,second new set of tires,rims and tires balance 11 times in 2 months at every different garage,no change,new rotors all the way around,2 new ball joints,outer and inner tie rods,and new wheel bearings,i tried the hard left and right turns to check the cv shaft but no clicking or clunking but some mech's say that its a 90 % chance one of the sockets on cv shaft are worn out causing my car to vibrate and have the shake in the wheel,any one no what i else i can try do to check cv shafts,replace the drivers side shaft i guess,all else is brand new in 3 weeks

You could run the car with jacks under the control arms to try and duplicate drive height and run the car at 50 mph max and see if you can see what is happeneing, be very careful doing this and it is a 2 man job of course.