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Discussion Starter #1 (Edited)
Im curious if anyone has had the rear alxe apart on their commander or changed the rear diff cover and happened to know how many splines the rear axle shafts have! It looks like it would be either 27 or 29 splines. If its 29 and its true that the rear is a 8.25 then they do make a rear locker that us QT II guys could use. Its a locker that can be installed with basic hand tools and you dont need to take out the carrier. I installed one on my ranger and would recommned it to everyone. Do you know what locker im talking about??????LOL
 

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Maybe the commander still new to start playing with it and take it apart, the Grand Cherokee is similar, you might find someone took the diff apart in it.
 

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Discussion Starter #4
nahhh not exactly....it's a Powertrax No-Slip. They are a lunchbox locker that replaces the spider gears. I installed one on my ford ranger and it was amazing. Doesnt make any noise like a detroit would, yet works amazing off road. They cost around $450 and can be installed in less than an hour. It took me 45 minutes to do mine but im mechanically inclined!

So if anyone is replacing there diff cover soon or replacing fluids and wants to quickly count the axle splines that would be great!~
 

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830AAM = 8.3" American Axle Manufacturers (or something like that). Its not an 8.25". Many peope just say (and assume) it is since its so close. Front is 790AAM = 7.9". As for spline count I am 99% sure its a 29 spline axle shaft for the rear at least. Dont get it twisted, this is NOT an 8.25 otherwise we would see others using the few lockers the 8.25 guys use. There is a reason why AEV even settled for the electronic factory units in their Commander. At the time there wasnt anything else offered.

-Jared
 

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Discussion Starter #6 (Edited)
All 4x4 Commanders have a Chrysler Corporate C213R rear axle also known as the 8 1/4" (the front axle is a Chrysler Corporate C200F). 213 is the ring gear diameter in mm and the front is 200 mm

Im not sure where you came up with the 830AAM because i know thats defiantely a Chrysler Corporate axle~
 

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Discussion Starter #7
Oh well its not a big deal. I just figured there was hope out there for our rear axles. Well im still going to go with my idea before so ill be running an ox locker in a couple months! Youll find out more when it happens. It's my secret!
 

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Are you sure about it not being a Chrysler Corporate 8.25? The online parts document for the 07 commander called it the 8.25 in the rear.

Did we ever determine if it was a 29 spline axle shaft? I finally got the word back from ARB and they said their air locker would work if it is a 29 spline.
 

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They are definitely 8.25's - that's been clarified on more recent threads. About the 29 spline, I don't know. I did take this photo when my cover was off this week - not sure if it helps...

 

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Discussion Starter #10 (Edited)
Are you sure about it not being a Chrysler Corporate 8.25? The online parts document for the 07 commander called it the 8.25 in the rear.

Did we ever determine if it was a 29 spline axle shaft? I finally got the word back from ARB and they said their air locker would work if it is a 29 spline.
Yes it is a Chrysler Corporate 8.25 in the rear!

I updated my old posts that stated othewise.

Is that locker for a c-clip axle or non c-clip axle?
 

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From what I have read the C213R or Chrysler 8.25 (8.3) is a 29 spline count axle shaft. This is the same axle they used in some of the later model XJ's but after 97' they changed from a 27 spline to 29. Here is what Yukon gear has to say (see the top of the page)

http://www.yukongear.com/DiffDetails.aspx?DiffID=7&PartsLink=PartCats.aspx%3fSearchMode%3dMake%26MakeID%3d7%26MakeName%3dJeep%2b%252f%2bAMC%26ModelID%3d380%26ModelName%3dGrand%2bCherokee%2b%252f%2bWJ%26Side%3dRear%26DiffID%3d7%26DiffName%3dChrysler%2b8.25

The USA Alloy axle page also lists the 97-01 with the Chrysler 8.25 as a 29 spline. http://www.alloyusa.com/jeep-rear-axles.html It would seem that its a 29 spline but this is just from doing some research and not actually looking and counting the splines.
 

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Discussion Starter #12 (Edited)
Like stated above and in other threads, our alxles were the first Chrylser 8.25's to become a non c-clip full floating axle, instead of a c-clip semi-floating axle like the other Chrysler 8.25's found in other vehicles.

All the products out there for the Chrysler 8.25 axles are all for c-clip axles.
 

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Discussion Starter #14

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Originally Posted by CommanderChaos
It's for a c-clip axle. RD-93 is the Arb part number.
...and they said their c-clip style locker will work for our non c-clip axles?
I just sent an e-mail that explicitly asks that question. Time to wait.
 

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Discussion Starter #16
I just sent an e-mail that explicitly asks that question. Time to wait.
Awsome, I was just curious as to what they had told you. I had asked them that question a few months back, but at the time they didnt know the answer. Basically they told me they wernt even sre if the locker would fit our axles. They wanted me to totally take out my rear diff. and gather all of the measurements and they were going to compare those measurements with the differential you listed. I never got around to doing that for them. I wonder how they decided that differential will definately fit if they never got the measurements.
 

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I got a response but I don't know a great deal about differentials so maybe someone can translate.

Gabe,



Unfortunately there is no way for us to confirm that. The RD93 is a 29 spline unit, if your axles are OE 29 spline shafts they SHOULD work, but the RD93 was designed for 29 spline aftermarket shafts. I can’t imagine the spline pressure angle would differ between the OE and the aftermarket, but again we have no way to confirm it. Any c-clip diff can be used in the same application if it has been converted or comes as a non c-clip version.



Best Regards,



Nils Bull

ARB Tech

[email protected]
 

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Discussion Starter #18
Looks like someone with a little extra cash laying around needs to be the guinea pig and try it out. Thats the only way were going to know if that locker will work or not. Plus thats our only option at the moment because ARB has no intentions in the near future to make a locker specifically for our vehicles.
 

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I'll put myself on the short list to do it this winter assuming I have any money at all after my divorce finalizes. I should have an idea about that late October early November if things go according to plan. Of course, by saying that I am certain that it won't go according to plan and I'll end up filing for bankruptcy.
 

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so we dont have dana 35's or 44's ? ok no prob. so what hope is their for us with 3.7 Lt .... i don't even have a button to push for 4x4 but if i hold the traction control button down for a minute it sorta locks all 4 wheels .... what can i do for gearing upgrade??????
 
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