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I Need help with something
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=67&t=91732
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Author:  Mopargarage [ Sat Nov 07, 2020 2:09 pm ]
Post subject:  I Need help with something

My 98 zj needs the front and rear differentials rebuilt. How do I figure out which ones it has and the gear ratio? Trying not to buy the wrong stuff.

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Author:  WolverineFW [ Sat Nov 07, 2020 2:38 pm ]
Post subject:  Re: I Need help with something

Are the metal tags attached to one or two of the diff cover bolts still there?

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Author:  WWDiesel [ Sat Nov 07, 2020 3:40 pm ]
Post subject:  Re: I Need help with something

Mopargarage wrote:
My 98 zj needs the front and rear differentials rebuilt. How do I figure out which ones it has and the gear ratio? Trying not to buy the wrong stuff.

Plug in your VIN number on website (link below) to see OEM build sheet.
4x4 axle ratio should be the same for front & rear. 3.73 is one commonly used ratio. :wink:

https://fcacommunity.force.com/RAM/s/equipment-listing

Author:  Mopargarage [ Thu Nov 19, 2020 2:21 pm ]
Post subject:  Re: I Need help with something

I was able to run the vin and it told my what diffs and gear ratio. Now are there any tips on diagnosing or rebuilding the diffs?

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Author:  Mopargarage [ Thu Nov 19, 2020 2:27 pm ]
Post subject:  Re: I Need help with something

Slow work in progress. Image

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Author:  cwmdiesel [ Thu Nov 19, 2020 9:47 pm ]
Post subject:  Re: I Need help with something

Just wondering why you think both diffs need to be " rebuilt"??

Author:  Mopargarage [ Sat Nov 28, 2020 8:18 pm ]
Post subject:  Re: I Need help with something

cwmdiesel wrote:
Just wondering why you think both diffs need to be " rebuilt"??
There's some slop and noise

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Author:  cwmdiesel [ Sat Nov 28, 2020 10:02 pm ]
Post subject:  Re: I Need help with something

can you describe the "some slop and noise"
Ive seen these go for well over 200K and still be fine unless you have abused the doo doo out of it or just want to change gear ratio

Author:  Mopargarage [ Mon Nov 30, 2020 12:54 pm ]
Post subject:  Re: I Need help with something

cwmdiesel wrote:
can you describe the "some slop and noise"
Ive seen these go for well over 200K and still be fine unless you have abused the doo doo out of it or just want to change gear ratio
When it was up in the air And I tried turning the wheels you can feel the slop when rocking it back and forth. It was worse on the passenger side. I just installed the new cv axle on the drivers side and it doesn't have e any now. Should I go ahead and to the passenger cv axle?

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Author:  Mopargarage [ Mon Nov 30, 2020 1:00 pm ]
Post subject:  Re: I Need help with something

I just installed the new cv axle and hub assembly. Had an ordeal. The parts store gave me the wrong hub assembly and axle. With the right ones installed there's no slop when you try to move the wheels back and forth.

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Author:  Mopargarage [ Mon Nov 30, 2020 1:01 pm ]
Post subject:  Re: I Need help with something

I will test drive it in a little bit. Maybe that's what my noise was the bad cv axle. Image

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Author:  Mopargarage [ Mon Nov 30, 2020 1:02 pm ]
Post subject:  Re: I Need help with something

All newImageImage

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Author:  Mopargarage [ Mon Nov 30, 2020 3:45 pm ]
Post subject:  Re: I Need help with something

The reason I thought the diff may need rebuilt because when I googled axle and diff noise on YouTube and it sounds like the same noise.

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Author:  cwmdiesel [ Mon Nov 30, 2020 11:37 pm ]
Post subject:  Re: I Need help with something

I'm guessing your on the right track and don't think you need diffs rebuilt but wouldn't hurt to change the oil in them!

Author:  Mopargarage [ Tue Dec 01, 2020 2:33 pm ]
Post subject:  Re: I Need help with something

cwmdiesel wrote:
I'm guessing your on the right track and don't think you need diffs rebuilt but wouldn't hurt to change the oil in them!
Everything seems to be working right. Now I just need to hit 55 mph when that noise started before.

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Author:  Mopargarage [ Tue Dec 01, 2020 2:33 pm ]
Post subject:  Re: I Need help with something

I changed the diff fluid front and rear.

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