So, I replaced my diff with a 2006 Tundra diff with 3.9 gears and LSD. After driving around since Monday I havn't had a problem until today.
Today I installed a URD CAI and when I test drove it. After mashing the pedel often and spinning tires and all that good stuff, my ABS and VSC lights came on solid. So I turned the truck off, the lights turned off and stayed off. I assume this is from the LSD and VSC not getting along, but I don't know for sure.
I have never had the lights just stay on as if there was a problem before....
If anyone has an idea I would appreciate it. Tried a search to no avail.
Edit : I've checked all of the wires and all looked good and were tight