Falcon51

Hi everyone Sorry to start another thread. Just thought I'd write up my own as a search doesn't seem to reveal any similar topics to what I'm experiencing at the moment. My 07 BF XR6 AUTO, driven as my daily on highways constantly. It has a very cruisy life and is always babied (although with the $ it's currently stealing from me, it doesn't deserve it 😂). When travelling around and between 30-35K (and often 50-55K also, although not as violent), its almost as if it loses all drive momentarily and then suddenly engages very roughly, creating a heavy jerk throughout the car and then a grinding noise can be heard coming from the rear. Also when accelerating out of a corner, the grinding at the rear noise occurs again. The Diff Bushes; both L&R front/upper ball joints, L&R Sway Bars, both front wheel bearings and diff oil were replaced less than 5k ago and in the past couple of days, I had the transmission serviced and the driveshaft repaired and balanced. This seems to have somewhat very slightly (barely at all) helped the issue but it's still extremely noticable and uncomfortable while driving. TIA