How to ID if rear diff is limited slip???? - Pirate4x4.Com : 4x4 and Off-Road Forum
 
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Old 05-26-2003, 08:39 AM   #1 (permalink)
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How to ID if rear diff is limited slip????

I am going to change the fluid on my 95 YJ 4-cyl. How can I tell if the rear diff is L/S and needs friction modifier?
I dont see any tags on the case, how about the bolt pattern or ??????
Thanks!
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Old 05-26-2003, 08:51 AM   #2 (permalink)
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LS cases are more "square", while open cases have a slight curve inwards when going away from the ring gear. So if you're looking at your diff, look from the ring gear to the right. Does the case curve or is it straight?
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Old 05-26-2003, 09:16 AM   #3 (permalink)
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Thanks for the reply.
I'm having doubts about what I think it is, could you take a look at these pics I took and tell me if you can tell for sure?
I dont want screw this thing up.

http://www.ofoto.com/BrowsePhotos.js...4159803&page=1

click on thumbnail for larger view.
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Old 05-26-2003, 09:37 AM   #4 (permalink)
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You have to remove the cover to see the carrier. No real way to tell untill you do. I'm pretty sure that 4 bangers didnt have a limited slip as an option.
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Old 05-26-2003, 09:44 AM   #5 (permalink)
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An open differential will look like this.

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Old 05-26-2003, 09:49 AM   #6 (permalink)
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Ah crap!
I dont have time to do that, I need to use it today and dont have time to let a silcone gasket cure. There's no way to tell from jacking it up and spinning the tire?
BTW, last winter I noticed that going uphill only one tire would get power and it never transferred power to more than one rear wheel in 2WD.
I dont think it has it either but I dont want to burn the clutches if it does.
Thanks for your help!
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Old 05-26-2003, 09:55 AM   #7 (permalink)
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If it has a limited slip, its a tracklock, commonly refered to as a trashlock. It doesnt take many miles to turn this limited slip into an unlimited slip. I wouldnt worry about it. How the hell are ya draining the fluid to change it if your not pulling the cover off? Pumping it out? Its always a good idea to pull the cover to see what kind of crap you have floating around in there, especially with the dana 35 rear end.

If your really worried about it then go ahead and put the modifier in, it wont hurt anything if you do have a standard open diff.
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Old 05-26-2003, 11:11 AM   #8 (permalink)
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Even if it is an open diff it will not hurt anything if you put the additive in it. If you're not sure, go ahead and put it in just to be safe.
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Old 05-26-2003, 09:16 PM   #9 (permalink)
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I have a factory "Trashlock" in a ff d60. When both tires are off the ground spend the wheels. If the tires spin in that same direction you have a limited slip. If they turn in opposite directions you have an open dif.
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Old 05-27-2003, 07:34 AM   #10 (permalink)
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Quote:
Originally posted by nathon001
I have a factory "Trashlock" in a ff d60. When both tires are off the ground spend the wheels. If the tires spin in that same direction you have a limited slip. If they turn in opposite directions you have an open dif.
This guy has the answer!
You jack up both wheels, and spin one with your hand.
If they both spin the same direction it has some sort of traction aid (limited slip, locker, etc.)
If the tires spin opposite directions, itís an open dif.
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Old 05-27-2003, 05:36 PM   #11 (permalink)
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Quote:
Originally posted by SilverZuk


This guy has the answer!
You jack up both wheels, and spin one with your hand.
If they both spin the same direction it has some sort of traction aid (limited slip, locker, etc.)
If the tires spin opposite directions, itís an open dif.
Just make sure you leave your tranny in neutral when doing this. Otherwise you won't be able to tell.
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Old 05-27-2003, 10:55 PM   #12 (permalink)
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just put 1 side of the axle on a jack stand and try to drive off it in 2wd. if it pulls it's got a ls. god it's hard to type while holding a 6 month old
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Old 05-28-2003, 07:22 AM   #13 (permalink)
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BTW, the silcone needs maybe 2 minutes to cure, if that. slap on the goo, bolt it up, and fill away....
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Old 05-28-2003, 07:53 AM   #14 (permalink)
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just put 1 side of the axle on a jack stand and try to drive off it in 2wd. if it pulls it's got a ls. god it's hard to type while holding a 6 month old
AMEN brother!! Mine is six months old today. Does your six month old start pounding on the keyboard if you blink to long?
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Old 05-28-2003, 03:45 PM   #15 (permalink)
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don't get me started.
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