Do you hear the rubbing only in tight turns? Sometimes a wheel and tire combination can rub on the fenders or the struts. You could have them check suspension bushings and CV joints as well while you’re in there.

Check your axle nuts to make sure they were torqued correctly. A loose axle nut will feel like vague, sloppy steering and is pretty dangerous because your wheel could fly off while you’re driving.

If you end up needing to retorque the axle nuts, make sure they are properly staked as well. This prevents the nuts from backing off again in the future.

Would this be the CV’s, or should I be looking at the steering rack? There is no clicking noise, and no grease leaking.

I’m not sure. If the knocking is coming from the engine, it could be detonation or rod knock. Could be a bad axle or CV joint, but you would probably hear that whether you’re accelerating or not. I recommend you get a diagnosis from a mechanic. If you can throw it up on a lift and take a look underneath, it may be easier to identify the issue.

I would take it back to the mechanic who replaced the CV axle and have him double check his work. The problem could be related or maybe not, I don’t know.

any ideas?

I don’t know. They are probably different, so I would double check part numbers to be sure.