Can't go wrong with a locker, they are alot better than GM's gov-lock
IMO, that's not proof that you don't have a G80. My G80 used to allow one wheel peals all the time. I got a good feel for when mine would and wouldn't lock up. I've seen some reports from people who can't get their G80 to lock at all. Where there is already damage to the carrier internals, it's possible the locking mechanism is also damaged. Take 30 seconds and check the RPO sticker in your glove box to see if there's a G80 code there.im pretty sure it is only an open diff only one tire drives