PM me and I'll give you my phone number so we can text. But the lockdown kit is a requirement IMHO once you get near +/-400hp (depending on suspension freshness and tires). Wheel hop will kill a diff if you power through it. Looking at your 17psi logs posted elsewhere you were near 380-390hp. You could have damaged that diff previously with wheel hop and it didn't die until later on the highway. A diff won't die on the highway, so you damaged it elsewhere doing other things. If you had hop...that's really hard on a diff.