I've recently replaced ball joints, inner and outer tie rods, cv boots, shocks, and a wheel bearing. Then I noticed dark grease under the power steering pump, and realized I was going to have to replace the rack and pinion bellows. Now I'm getting peculiar noises though, a higher pitched whining or whistling and a scraping sound. What am I likely hearing, it wasn't there before the bellow replacement. 

Could be the dust plate under the bell housing. On manuals it’s a small rectangular plate, I’m unsure about the setup on autos. 

Maybe something levered this into the flywheel. 

Other than that I’m all out of ideas atm. Can you tell us under what conditions you hear the noise? Eg: at idle/under loads/at or above a certain speed. Is it rotational dependant? Rough location of the noise? 

Cheers 

Bennie

What steps did you take to when replacing the bellows?