My son has a1995 f150 4x4. He replace the front wheel bearing while doing the brakes and he tighten the bearings to factory specs, something like 200lbs? Now he has some growling noise in the front, i told to back the torque off the bearings. I told the way i do bearings, tighten them up while spinning the wheel then back it off a 1/4 turn. He still has the noise. Any suggestions, he is thinking its in the manual locking hub system. Can't find much detail or pictures on this.