2012 WRX, only time I ever get on it hard is when getting on the highway. Was driving hard from 1st to 2nd but as soon as I dropped it into 2nd and let the clutch out I heard a loud bang from the rear. I assumed it was the rear diff hitting the subframe? I shifted around 6500-6800. Is that simply too much? I kept going hard and the shift from 2nd to 3rd went smooth. Should I look into the whiteline diff bushings? It's not often I drive hard like this but the bushings aren't that expensive.