So the trip to USCA at NCM went pretty well I guess...car did good, driver did okay...there are a couple of videos and pics on my event report thread.
On the cool down lap of the third session of the road course, I heard a slight grinding noise speed related. I put the car on the trailer at that point and decided to diagnose when I got home. Upon inspection today, I found this.
Driver side front inside wheel bearing was just starting to eat itself. The grease in that bearing was cooked.
Here is the pass side next to it, pass side was still tight and rotated smoothly.
Super glad I stopped when I did, it would have surely completely failed in just a couple more laps at speed.
Since I had it all apart anyway, I pulled out the brake pads to inspect. These are EBC YellowStuffR pads that are about a year and a half old with maybe 200 autocross runs on them and 1 and a half track days.
There is still plenty of pad left, but they are glazed over and actually starting to come apart around the edges. The rear pads look similar.
As I was checking the rotor temps during my post session stat taking, I noticed the rear rotors were about 100 degrees hotter than my fronts. I'm assuming this is because they are hidden behind dust shields and the front rotors aren't. Check out how hot the rear pads got...
It actually starting boiling the coating off of the back side of the pad.
Thankfully these are all pretty easy repairs and fall under the "wear and tear" category. New bearings, seals and pads will go back on soon.
The other issue will take a bit more thought...and money...to fix.
Driver side is better which makes me think the diff itself is starting to come apart. This is a 9" with a 31 spline tracloc diff that was refreshed with new bearings and seals about this time last year. I've been driving through the posi coming out of both left and right autocross turns, lifting and spinning the inside rear tire. Time to seriously consider some sort of upgrade here.