So the other day my alternator died so I just replaced it. I drove the car around the past couple of days no issues. But today I was giving her some beans and at about 5000rpm the battery light flickered on. I let out of it and the battery light went off again. The battery seems to be changing just fine except under very heavy loads... I didn’t replace the belt when I did the alternator because I’m stupid and didn’t think to do that. That leads me to my theory of slipping belt. That’s my best guess. Don’t hear anything over sound of exhaust so don’t really know. Any idea or suggestions?