hi guys i have a problem with my rear brakes ..any time it gets down below 40 deg my rear brakes lock up for the first few stops and it alternates from side to side (locks up one or the other) i have pulled drums and nothing seems wrong no leaks or broken parts..
99 dakota sport 4x4

 

I would clean and lube everything. You may need to replace hardware, springs etc and bleed the lines.

 

Could be water in the lines or wheel cylinders. possibly freezing when cold ( cheep brake fluid , in my experience, will draw more moisture from the air over time than quality fluids)

 

thanks for the replys i just picked up a vacum bleeder so i can flush system