Diagnosing Differential Problems | West Coast Differentials

• A howl or whine during acceleration over a small or large speed range is usually caused by worn ring and pinion gears or improper gear set up.
• Rumbling or whirring at speeds over about 20 mph can be caused by worn carrier bearings. The noise may change while turning.

I'm having both of these issues I guess, the howl is around 20-25mph. I haven't noticed a change in the noise while turning but still can't rule it out.