@mrsdye2313 ,Kelsey, Best to have a good local lock smith come and take a look. They are familiar with the GM ignition issue's and may save some time and money by not replacing parts, they can match the up the tumblers in the cylinder. Link below will show how to remove the switch. Good luck. I hope this helped you out, if so let me know by pressing the helpful button.
UP DATE 04/20/2017
Kelsey you must have changed your question after I had answered the ignition problem you were having, you really should have posted as a new question. Now you say you TC making noise, best to have a good local transmission shop have a look, these noises in the drive train can emit from different locations could be from rear end/drive shafts/transmission/TC/etc., a trained ear can probably locate and give you diagnoses. Good luck.