Info on a lockright

I currently have a 79 cj-5 with the model 20 rear with 1 piece axles and its suppose to have a trac lock in it. Well the track lock is whooped. you can stop the wheel from turning with 1 finger. I am interested in a lockright, but according to the catolog, it will not work with factory traclock. Does anyone have info on this? Thanks

ITS GOOD ENOUGH /wwwthreads_images/icons/wink.gif