Rear Differential

[EriksKJ]

Hi all, first post and of course it has to be a question...my bad!! But, I bought my KJ 05 Silver Limited about a month ago, and I am unsure if it has the Trac-Lock rear diff. Is there a way to tell with out opening it up? I plan on doing both diffs today and I want to make sure I don't have to buy the additive for the rear diff. Thanks for you time.

Erik

 

[retmil46]

If you've got the VIN number handy, I'd imagine you can check one of Chrysler's or Jeep's websites or call a dealer service rep, and they can tell you whether or not your vehicle was built with an open or limited slip diff - I know you can go to the Jeep website, punch in your VIN number, and it will tell you if there's any open recalls on your vehicle.

If I remember correctly, there's a physical check you can do that involves jacking up the rear of the vehicle, and what happens when you try to spin one tire - but it's been so long since I've dealt with it I can't remember what reactions you're supposed to get that's different between an open and limited slip diff.

 

[LibertyTC]

There also could be a tag still on corner of the axle (Trac-Lok)
It is just easier to call or get dealer no charge to do a print out from you VIN of options.
Using the 75W-90 GL5 lube with the positrac or limited slip additive will not hurt an open diff. You can buy the GL5 with the limited slip mix already included. Two quarts & you are good to go then.
If you want the Chrysler Limited slip bottle the Chrysler part # 4318060