I'm concerned about it not ratcheting.  My truck (1999 5sp Grand Vitara) with lockright has never ratcheted/differentiated correctly.  I bought the entire 3rd member (Sidekick with 5.13 gears) from Trail Tough with locker pre-installed, and I just had a guy take it apart and reinstall it 3 times after an axle break (this guy does lockrights all the time).....and it CANNOT be made right.  For some reason, it will ratchet on the bench, but acts like a spool when installed in the truck.  
Be aware that this can eventually lead to axle failure.  For my truck, it took several years.  Eventually, the innermost 1 1/2 inches broke off on the driver side axle.  Also, all of the pins of the locker broke and eventually scarred the diff after a big bang while backing up in a Lowes parking lot.  Tire wear gets pretty excessive when it doesn't unlock.  I was going through rear tires extremely fast.  There appears to be no fix for this.  If ANYBODY has a lockright functioning correctly in a Vitara, I would love to know what third member was used (exact year and model please), and what year Vitara/GV/Tracker/etc. it is in.  Also, which part number for the locker.  This has been a PITA for me.  Diff work in these trucks is expensive and time consuming....
That said, I wish you all the best, and enjoy your newfound extreme traction....