My rear end locked up out of nowhere y ABS light came on feels cluncky then lock

I have the EXACTLY same problem right now, exact year make model, I just had the transmission replaced, after having it rebuilt 13 months before (almost $7k in repairs within less than 2 yrs), now this! Ughhh....only difference is my ABS, check engine, aND traction control lights come on when this happens....my husband thinks it is my ball joints and wheel bearings.taking it to my.mechanic this Tuesday. I have been reading up on it, and it may be your ABS sensor is bad, I am pretty sure I have more than a couple of problems with this vehicle yet again. Wish I never bought it.