1) How do you tell what rear axle you have? I own a 03 Renni. 2) whats the difference between trac lock & select trac & How do you tell which you have? 3) When purchasing a locker it ask for open or locked diff. How do I know whats what?

1.) you have a 8.25 rear axle
2.) Trac lock and select trac you are mixing rear axle terms and names of transfer case. Trac loc is the factory locker for the rear axle, select trac is one of the transfer cases offered .
There should be a green tag on the right side near the wheel that says what you have a nd if it has a factory type locker.
When you order you should know if you have a open case or have a locker yes

Best way for you is to request a build sheet that Chrysler will provide to you and that will show what transfer case, rear axle etc you have

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MUDD'S MOTORSPORT'S We do IFS lift installs ,
03 OVERLAND EDITION /Kilby-Skidrow-Mopar-4XGuard skids/ 2.5 inch TOTAL CONTROL JBA coilovers -JBA Arms/MOABS-31 FALKEN WILDPEAK AT3W / 4.10's etc, 04 Kilimanjaro Edition loaded, plus 05 KJ limited

Thanks

to tell if you have the trac lock, jack up the rear end and roll one tire forward. if the other side turns backwards, you have an open diff. If it turns the same direction, you have the trac lock

travis

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2006 Liberty Sport CRD new injection pump, new fuel head, waiting for #4 injector at the dealer...2 weeks and counting
1984 CJ8
1980 CJ7 runnin' on propane
1973 J4000

I think I will have to try & jack it up & see. Im curious because I feel the rear grab at times. If I reverse, stop, & then put it in drive & drive I feel the rear end grab. Or on turns It seems to grab. Not sure if this is the charcteristics of the trac loc. I had a 85 toyota pickup before with a welded rear . You cant not notice that its lock when its welded. anyway I will jack it up & check. thanks for the input

There was never a "locker" offered in any KJ,the Trac Loc is a clutched based limited slip diff.

If your planning on getting a locker like the ARB airlocker it doesn't matter if you have the tracloc since the ARB is a total carrier replacement.Now if getting a lunchbox style locker(powertrax) you will need to get the correct locker for your carrier.

Thanks TJKJ2002. I am planning on installing a ARB air locker. Its nice to know that it replace everything.