power steering
 

my cooper s is an 05, I just replaced cv axle, wheel bearing hub , outer ball joint and flushed and filled tranny. My steering is very stiff, no power steering fluid is leaking and the power steering fuse is good. the power steering was working before all this work but could the power steering go out without any noise or leaking fluid? the steering turns freely when jacked up but not on the ground, is it the pump?