Phillipsplumbing

I have an 06 ford transit connect t200 swb i recently swapped both front ball joints on my vanand as soon as i did that wenever i am doin a sharp turn there is this odd lil sqeak i wouldnt of thought it would be from the joints it only seems to happen on slow turns on sharp turns ? Checked my power steering fluid and thats perfectly all levels are fine but still cant think wat it could be there is no rattling ofany kind ether ?