I have a posted once before regarding vibrations in the rear of my 2014 tremor I have since had the wheels road force balance and replace the Perelli tires, balance the tires and check the roundness of the rims I still have a vibration ...can someone tell me what kind of driveshaft I have ? and whether or not they have noticed a problem or had complaints regarding it ( vibration )
Thanks

 

This is a 2-piece drive shaft on the F150.