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Limited Slip rear diff??

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Old Mar 19, 2009 | 11:18 AM
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Limited Slip rear diff??

My dad has a 2000 Ranger 4x4 ext. cab and we're going to change the rear diff fluid. He went to our local Ford dealer but he said they had a hard time determining what kind of diff (LS or not) is on his Ranger based on the VIN number. He said after a few minutes of browsing the computer the parts guy just studdered and said he's 'pretty sure' it's NOT a LS diff.

So I want to find out for sure. How can I determine if the rear diff is LS or not? Did 2000 4x4 rangers even come with an LS diff? Thanks
 
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Old Mar 19, 2009 | 11:40 AM
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Yeah, you could get an lsd in a ranger 4x4 or 2wd. The difference is that the lsd needs a frction modifier. There should be a little tag on one of the rear diff bolts with the info on it.
 
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Old Mar 19, 2009 | 12:02 PM
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Yeah I'm familiar with all of that. What will the tag say if it's an LS... LS, NS??
 
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Old Mar 19, 2009 | 12:58 PM
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there is ID plate bolted on. Just clean it and read it carefully.
 
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Old Mar 19, 2009 | 01:12 PM
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send me the vin so I can check for you.

Ed
 
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Old Mar 19, 2009 | 01:16 PM
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It will read 3L55 for an LS diff, and 3 55 for an open diff. You can also look for the axle code on the drivers door or door pillar.

 
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Old Mar 19, 2009 | 01:17 PM
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my understanding was if you jack up the back axle and rotate 1 tire and the other tire rotates in the opposite direction it is not LS. Anybody else heard that?
 
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Old Mar 19, 2009 | 01:23 PM
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yes, if tranny is "parked".

but if you have LSD you feel friction.
 
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Old Mar 19, 2009 | 07:46 PM
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Axle code is 97 so it's an open diff. Thanks everyone.
 
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Old Mar 20, 2009 | 06:21 AM
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yeah, it is open, like mine/

I used to think to swap it... I want LSD!
 
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