brakes Grinding When Shifting ONLY When Braking

[rag0]

Hey folks,

A while ago I made a post about some ABS stuttering, well turns out I had terrible rotors and worn thin brake pads that the dealership never replaced (had bought the truck about 2 months prior to it starting). I just recently (about 3 weeks ago) had the rear rotors and rear brake pads replaced as they were the ones in question. Before I took it in, I noticed I was getting some grinding and somewhat squeaking noise when I shifted (sitting at a complete stop) from P, to R, to D, and not just in that order. It ONLY occurred when I was holding the brake to shift. Well 500 dollars later, it’s still happening. My grandfather, a master mechanic in his time, said it’s likely not transmission related and it because “somethings hitting”. I don’t know if he’s right or not but I’d like to get some second opinions if anyone has an idea what’s going on.

 

For some background info, it’s a 5.3L V8 L71 2015 Silverado 1500 4WD Automatic

[silveradosid]

check the driveshaft u joints