Loud Z Lead Screw when moving bed down

I was working on the printer and did some changes on the gantry to add ABS printed parts. I didn't touch the bed or make adjustments to the frame. The left Z lead screw became really noisy for some reason. When it moves down at a Section in the beginning it is really loud. There's no binding, I can easily rotate the motor by hand where it still makes the sound just not as loud.