Factory GM Rear Diff Fluid - 11,000miles - '10 ZR1

[Peted]

Random Analysis I had lying around.

-Street driven

-97% city / 3% hwy

-Completely stock. From the Filters to the Engine

 

[SteveSRT8]

With all that power it is unlikely you can unleash that monster for very long, when you factor in the curb weight I would think the rear end actually has a pretty easy life...

 

[2oldtommy]

What fluid did you use to replace the factory fill? ---Oldtommy

 

[Peted]

Originally Posted By: SteveSRT8
With all that power it is unlikely you can unleash that monster for very long, when you factor in the curb weight I would think the rear end actually has a pretty easy life...


It's a rocket, let me tell ya.

 

[Peted]

Originally Posted By: 2oldtommy
What fluid did you use to replace the factory fill? ---Oldtommy


Factory filled. They use Mobil 1 synthetic 75w90.

It's my father's car.

 

[oldhp]

Please make sure Pop's car doesn't get carboned up.
Test drive weekly to make sure.
Sunday early mornings are best...popo ain't up yet.

 

[Jim Allen]

I enjoy seeing the factory fill UOAs because they help give us a picture of the break-in process. This one looks pretty mild compared to some I've seen. More and more, the OE are building better gearsets that are made on more precise equipment and lapped. These things greatly reduce the wear metals from break-in.

Still, wear metals taper off rapidly after break-in so , bearing in mind there are not filters in the diff, that first oil change is likely the most important for long term wear.