My 98XJ/8.25 came open, I put an auburn in that, our 97ZJ that I bought last year had a bad D35 so the whole thing had to be rebuilt, carrier was also screwed up so I put a factory LSD in, it was only $40 or so more than a new carrier. TJ is next in line for either a limited or a locker, not sure yet which. You also can't go by the full sized spare, my 98 had a full sized and no locker, you either need to get the build sheet, look for the 'needs additive' tag on the axle housing or open it up and eyeball it to be 100% positive.