I unhooked the cable and squeezed the calipers manually. they were a bit rough but got better with some lube. then i unhooked the rear housing and lubed up each end and the adjustment screw interior where it runs through. now when i squeeze the brakes the caliper operate properly but i get slack in the cable along the top tube and the front housing is loose enough to pull out of the braze on after squeezing the brake lever. front housing issue?