Somthing binding every once in a while?

[Chilly178]

Hello, I have a 72 C20 with a 350, SM465, and Eaton no spin rear end 4.10 with the locker. I have changed the fluid in the transmission and the rear end with Mobil 1 gear oil within the last few years. Also the engine is brand new. I haven't touched any of the u joints, carrier bearing, and never removed the diff cover. Once in a while I get some sort of binding or something where its kinda like a pop and the whole truck hesitates for a second then keeps going. Its one of those things where when your friends hear it they think you just blew something or hit a big pot hole then you tell them no it does that once in a while. I'm thinking it happens when I turn a corner for the most part. Seems like it could be possibly getting more frequent. Any ideas? It's gotta be in the drive line somewhere. Also my rear brakes are squealing now at very low speeds like a crawl and they sqeal when I hit the brakes, but not all the time. I just replaced the brake shoes (not the springs) and brake cylinders two years ago and I'm annoyed that I have an issue back there because taking the inner axles out to get the drums off is a pain. I tried backing up in reverse then stomping on the brakes but it didn't seem to help. I'm pretty sure it isn't the E brake because the cable was adjusted last spring and it doesn't seem to be dragging. I know there is an adjustment for the shoes you can get to without taking the drums off not sure if they need adjusting? Any ideas on my issues? I'm thinking that my rear end is gonna get torn apart this winter, which sucks becasue I need to rip into the front end and replace all those suspension components because its all really old. Owning an old vehicle is hard work.