Light Acceleration Drive Train Whine

[Camp Vernon]

2020 Trail Boss, 1/2 Ton, 4x4, Crew Cab, 5.3L

Replaced tires at 40,000 miles with less aggressive all terrane tread.

When traveling between 45 and 55 MPH, and slightly accelerating, I hear a whining noise coming from the rear end.

When I lift my foot from the gas pedal the sound goes away.

Dealership charged me $90 to say that it is normal rear differential pinion mesh noise.

Any thoughts?

 

[HondaHawkGT]

Well you could pop the cover off and check things out inside. I changed my rear diff fluid at around that mileage. You might be able to see abnormal wear or you could even check the pattern. It's not terrible to do. Plenty of videos on youtube for those wanting to check the mesh pattern.