Hmmmm, I'm not sure, but you mentioned the clutch.
My Alero is an automatic, but my Volvo is not. I had the clutch replaced in that and I heard the banging I think you are hearing. My mechanic did the job but broke a motor mount in the process and didn't notice it. He fixed it and towed the car on his dollar, so I can't complain.
5 speed Aleros are rare, so I hope my probelm helps. Mine was only when I would shift gears though, since the entire engine shifted in the bay
33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12