No, IIRC like all other synthetics you have an extended change cycle. I don't do synthetics on my taco because I don't think it's worth it. I put synthetic mobil1 in my diff at 30k and now my truck is at the dealer getting a new diff at 54k. Thank God for warranties.
Before anyone has to ask, yes I put in the right weight, type and volume of gear oil in the diff.
To what do you attribute your diff failure? Do you think the oil had anything to do with it?