Burned rear diff oil
 

So I was at auto club speedway this past weekend, 100+ degree weather, and I'm sure I burned the fluid. I have an open diff and I was running r-comp tires.

I didn't notice a whine until my third session, and at first I thought it was my tires screeching because I could only hear it at lower speeds, but in just one lap, it went from that, to full screeching under any acceleration and the car was smoking. When I got to the garage and checked it, the breather valve must have been vomiting because they're was fluid everywhere.

Tried to let it cool off, but it was no good and had to limp the car home(no tow truck) l would get it up to 35 mph then coast until I needed to get speed again. I only live 20 mins from ACS

My question: my hopes are that all I have to do is change the diff oil and all will be ok? Or is it possible that I ruined the diff somehow? What should I look for when I change the fluid?

2012 base I had redline in there changed about 9 months prior

Thanks in advance.

from my experience once you hear the whine the damage is done, once you replace the fluid it will keep whining so you need to fix it or it will lock up on you one day

Sounds like its time for an upgrade. That sound your hearing is the sound of money you need to spend. BUT you will much happier in the long run, I promise...

I'm sure I would, unfortunately my wallet isn't happy enough for an upgrade lol so your saying there's no coming back after the whine is present? What exactly went wrong? Is there something I can replace or rebuild inside the diff?

You won't exactly know what went wrong until you open it up and take a look. But from the sounds of your post, you had catastrophe failure.

As per Wonka2581, you won't know for sure until you take a look. Your description (and the fact that you drove it so far in that condition) doesn't make me optimistic. But you might get lucky.

It's toast. Flushed fluid, still whining.