Civic EG

When I reverse slowly and turn the steering wheel left or right it clicking loud enough to notice but that's only when I go slowly but if I gun I don't hear it could it be my axles? I did replAce the tranny with one that was good before I got it since I tested it when I was in the car any help would be good thanks

axels would be my first guess

def axles.

i would have to say axles, check for torn boots, greese leaking out or signs of a re-booted axle.