I don't believe the differential was ever serviced. I will have to tell the mechanic to check the axle bearing. The truck is at the mechanics today.
I do know there are some sort of pins in the pinion bearing area that were broke. The mechanic fixed them hoping that it would fix the whine noise. It didn't, so he was thinking about replacing the main pinion bearing.
I will let you know what I find out!
Sunday, September 1st, 2019 AT 12:06 PM