i put 4.10 gears in my car 2 years ago every thing was right pre load the aliment of the gears every thing. any way after 1000 miles they started getting loud only when i was really light on the gas from 40 mph to 60 mph or off the gas from 35 to 0 mph the sound was a loud whin from 40 to 60 and a wha wha wha sound from 35 to 0? i changed u joints, tires, wheel bearings, and i just now put all new bearing in the whole rear end re set my gears "that still looked good" and the car sounds the same???? i think it is coming from the passenger side rear pls help very furstraded at this point

 

If they aren't set up right, they will start to whine. When you drive it like that for a couple years, you aren't going to be able to eliminate the noise. The pattern is worn in and the gears are usually ruined.

 

they are set up right tho. i have heard that cheap gears just whine is that true these are motive gears.