Well, after 5 years and 95K miles, my trucks rear end is whinning. Checked the fluid and it was LOW. Filled it back up and still whinning. It only makes noise when under acceleration or holding speed. It gets quiet when off the throttle or in neutral. Any suggestions on brand I should get next? And I'm assuming its my gears and not my G80. But both will get replaced if its my gears.

 

Installed 25+ sets of motive gears and never had an issue..

 

my pinion bearings were getting loose so i threw new ones in there.. What i couldnt figure out is why mine wasnt whining.. The contact patch was all the way across not just one lil spot in the middle. i threw it back together and its still quiet??
Factory 3.42s with 275,000 miles on them.

 

How do I know if its the bearings or gears itself making noise?