Clutch, tranny, or rear?

So awhile back before winter I was driving in my 2000 mustang and leading up to what happened I would hear really loud ticking almost banging like a wheel was catching on the wheel well plastic. I was going to get gas one day and the banging was noticeably worse, I was cruising in 3rd, got on it to go into 4th and just heard a really loud boom and 3rd was grinding. Put it in neutral right away so I pulled over and I tried 1st and reverse with same grinding. Add on that if I were to dump the clutch it would be like I just took off normally (19 and showing off, we’ve all been there) Any help is appreciated.