I cant be 100% for sure with this being the internet and all.
I am basically an armchair mechanic right now, but anyways, I think about 2 weekends ago at work, we had a 05-ish ford taurus in and he had the exact same issue you are describing. He came in and said he was leaving his hotel and left the parking lot and when he wanted to turn left, he couldn't without 2 handing it, but when turning right it was perfect.
So we ended up replacing the rack and new fluid and all was good. Having a rack go bad is very possible, and if it was me, I would replace it.
