Steering wheel is shaking, I can feel it under my feet

Last month I went into Goodyear to get a alignment done because my steering wheel was shaking and when that happens it is usually a alignment problem. Well unfortunately my tie rod was broke so I had to get that fixed so I did. After that my car drove okay for a few days then the shaking came back, but I also felt the shaking under my feet. I thought maybe a wheel bearing or a bad axle but after going to a few mechanics and doing research those were not the issues. I finally got into my local mechanic and had him test drive it and at first hes said I had a bad wheel, but after he looked under the car he showed me my rack and pinion was loose. He did not take a long enough look to give me more information he just just showed me how it was wobbling. Now currently my issues are the steering wheel is shaking and there is shaking beneath my feet. The steering is not bad I can turn fine but the steering wheel does not come back fully on its own it kind of slowly skips back to its original position. Also my car pulls to the right. Also, there is literally no noise. There seems to be a tiny leak from under the car but I was not told by anyone that there was a leak. My local mechanic said I could drive it another two years and be fine but I really do not see how that is true when my steering wheel is shaking and I feel shaking under my feet.