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Unread 05-13-2013, 05:29 PM   #1
Raimundo
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Differential

how do I know if I have Limited slip differential or no? I have to replace ball joints and since I have to remove the cover, I'm going to replace differential lub too.

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Unread 05-13-2013, 05:40 PM   #2
PolkaPower
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Considering that you do not have ball joints on the rear axle that leads me to believe you are working on the front. No ZJ ever came with a limited slip front end so I would say that unless someone put one in later then you do not have one.
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Unread 05-13-2013, 05:42 PM   #3
SuperStew11
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I know with the rear axle when it is in Neutral if you spin a wheel if they both spin the same it's the limited slip, not sure if that will work with the front

Also there should be an identification plate on your diff that should tell what axle and gear it is. A quick google off of that will tell you
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Unread 05-13-2013, 07:25 PM   #4
dnuccio
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Look for the tag on the rear diff cover. If you have lsd, there will be a tag that says "use limited slip additive only" or something like that. If you dont have lsd, there will just be the normal gear ratio tag
If you're still not sure, just put in the additive anyway. Even if you dont have lsd, the additive wont hurt anything. But if you do have LSD and you dont put the additive, you can hurt the clutches
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Unread 05-13-2013, 08:43 PM   #5
tucsonzj
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get your build sheet from Chrysler? it'll tell you if it has a LSD or not, not to mention the tag, if it's still on there it'll tell you. Worse case as said throw the additive if you're not sure.

I don't think 93's came with a LSD but i'm not sure.
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Unread 05-13-2013, 09:07 PM   #6
dnuccio
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Originally Posted by tucsonzj View Post
get your build sheet from Chrysler? it'll tell you if it has a LSD or not, not to mention the tag, if it's still on there it'll tell you. Worse case as said throw the additive if you're not sure.

I don't think 93's came with a LSD but i'm not sure.
saw a 93 in the boneyard with LSD
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Unread 05-14-2013, 03:15 AM   #7
tucsonzj
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Originally Posted by dnuccio View Post
saw a 93 in the boneyard with LSD
huh I stand corrected...I have never seen one how interesting.
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Unread 05-14-2013, 04:30 AM   #8
AmishFury
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Originally Posted by dnuccio View Post
Even if you dont have lsd, the additive wont hurt anything.
except your wallet though some brands of gear oil include the additive (IIRC valvoline synpower does and it's cheap)
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Unread 05-14-2013, 07:53 AM   #9
dnuccio
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Originally Posted by AmishFury View Post
except your wallet though some brands of gear oil include the additive (IIRC valvoline synpower does and it's cheap)
when i changed my diff fluid (i have lsd) i bought the additive from the dealer for 15 bucks. if you dont know if you have lsd, thats still way cheaper than having the lsd rebuilt if you fry it by not putting the additive in.
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Unread 05-14-2013, 08:12 AM   #10
PolkaPower
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When you open the diff you should be able to visually tell a limited slip carrier from open. http://www.jedi.com/obiwan/jeep/pics...rriers_720.jpg
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Unread 05-14-2013, 08:18 AM   #11
dnuccio
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Originally Posted by PolkaPower View Post
When you open the diff you should be able to visually tell a limited slip carrier from open. http://www.jedi.com/obiwan/jeep/pics...rriers_720.jpg
the lsd one is the more square one right?
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Unread 05-14-2013, 08:24 AM   #12
PolkaPower
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the lsd one is the more square one right?
Yes
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Unread 05-14-2013, 02:01 PM   #13
ratmonkey
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you won't fry it if you have to drive to the parts store after filling it to get a tube of diff additive.

also, if it's not worn out in most of the zj's still on the road, i'd be amazed. they really only last about 100k before you need new clutches.
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Unread 05-14-2013, 02:20 PM   #14
BuzzZJ9er
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Not to hi-jack but if you weld the spider gears, even with LSD, the additive is no longer needed correct?
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Unread 05-14-2013, 02:49 PM   #15
KingtheZJ
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Originally Posted by BuzzZJ9er View Post
Not to hi-jack but if you weld the spider gears, even with LSD, the additive is no longer needed correct?
correct
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