Guessing from the part number, the Samurai is for a 10 bolt, and the Trackick is for a 12 bolt?
Sammy part number: PWT 1510-LR $233
Sidekick part number: PWT 1512-LR $270
Hmm...That makes sense.
No, that doesn't make sense at all. What would the number of ring gear bolts have to do with a locker? Nothing.
BTW, not that it is relevant, but the early trackicks had 10 bolt rear ring gears.
I thought one part number is with sidegears and the other is without. ?
The 1510 and 1512 both reuse the stock sidegears, the 1530 comes with replacement sidegears (couplers). I think they say the 1510 is for the samurai, while the 1512 is for the trackick (but the 1510 fits trackicks just fine and is usually cheaper....as noted above).
Ohio_zuki......don't call that off-road store any more. If they don't know that a tracker and a sidekick are the same thing when dealing with lockers, then I wouldn't trust them for any info.
To answer your original question.....a 1510 or 1530 lockright will work for your 93 tracker. Get a 1510, if you think your sidegears are good enough to reuse. Get a 1530, if you want replacement sidegears (lock right calls them couplers). With whichever one you decide to get, you will have to use the specified sidegears/couplers (meaning....you can not use stock sidegears with a 1530, nor use replacement sidegears (couplers) with a 1510).
If you need pics......go to the link below and type in (or click) 1510 and 1530....it will show you pics of what each of them look like....
http://www.spidertrax.com/s.nl/it.A/id.627/.f