First off, I think I forgot to mention that when I did the 199mm tundra brake upgrade it seemed weird to me that there was only a spring clip on one side of the brake pads to push them apart. It seemed to me that this would be an uneven force that might lead to one side of the pad to possibly drag a bit. So I bought a brake hardware set to add an additional spring clip to the other side of each of the brake calipers. FYI, I went on a 200 mile road trip and the brakes worked great the entire time and this picture is from after the trip.



I took the advice from a previous comment and checked my rear differential breather. I heard a rush of air equalizing as I removed it so I'm guessing it isn't working properly. I will be ordering a new one to replace it.



I then checked both rear ABS sensors as advised by the same person and found them both coated in what I believe is grease. I take it this is not a good sign?

Rear Driver Side


Rear Passenger Side