hi, everyone. it's been a little while since i posted. i need help with a grinding noise coming from the axle on my 77 NYB. we thought at first it was axle bearings, but those turned out to be fine. I've replaced the gear oil, including the Mopar friction modifier in Valvoline 80-90 non-synthetic, but something in the rear axle is making grinding and clicking noises, and at slow speeds actually affects the movement of the car. the noise only begins after 10-15 minutes of driving, so...
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