My LSD in my 90 Montero that I took out of my 87 Raider works perfect. It is over 20 years old. It pulls posi every time on dry pavement gravel and mud. The only time it doesn't is when one of the back wheels come off the ground and even then all I do is pull the e-brake and posi it is. The only thing I need to do is change the gear oil only because I'm not sure when it was last done. Autozone has an LSD additive to put into the gear oil when you go to change it. I will be doing the same. My LSD made a world of difference when I put it in. Good luck.