So I had a rack and pinion Leak on my 2010 G37s coupe, I had the rack and pinion replaced, and did an alignment. Car was running smooth until I replaced my passenger side tire. After I replaced my tire my steering wheel started to vibrate when I hit 65-75mph then stops. I went to go get the tire balanced but my steering wheel still vibrates.
anyone have any idea what’s wrong with it?
thanks.

 

Try getting a road force balance.

 

Could be worn tie rod bushing, bad wheel bearing or warped rotors

 

It can be your bushings or your wheel bearings. If you have warranty on your car it should be covered.