Have a slight hum in the front. I was told it is in the front differential. I was told I could drain the gear oil out and replace it with 85 140 purple gear oil and that will stop the hum. It just started, the car has 185000 miles and is used to go around town, can you help, please. Retired veterian
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Tuesday, September 8th, 2015 AT 9:59 AM