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Unread 10-30-2013, 10:55 PM   #26791
Syncityj
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1998 ZJ 
 
Join Date: Apr 2013
Location: Henderson, Nv
Posts: 428
Looking for info on changing gear oil in a 98zj. Front and rear. Anything helps. I don't know where to find the particular diff info. I know I am opening myself to ridicule and rude comments but hey, I need info, so as long as the comments come with answers...bring it on.

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Unread 10-31-2013, 12:17 AM   #26792
kg6mov
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1996 ZJ 
 
Join Date: Nov 2012
Location: Cupertino, CA
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75-140 is spec'd but 80-90 works if you don't tow. If you have lsd in the back (tow package I think) you need to add a friction modifier or use a diff oil with it already there like royal purple.

I just did both rears in mine and dumped royal purple 75-140 in both, I think the PO had used cheap crap and no friction modifier in the back of the niner and now the LSD in back works much better.
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I heard someone yell "mall crawler" from the back porch. I'll go see who said that. Be right back.
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Unread 10-31-2013, 03:59 AM   #26793
ejschultz
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1997 ZJ 
 
Join Date: Feb 2010
Location: Crown Point, Indiana
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Quote:
Originally Posted by Syncityj View Post
Looking for info on changing gear oil in a 98zj. Front and rear. Anything helps. I don't know where to find the particular diff info. I know I am opening myself to ridicule and rude comments but hey, I need info, so as long as the comments come with answers...bring it on.
Quote:
Originally Posted by kg6mov View Post
75-140 is spec'd but 80-90 works if you don't tow. If you have lsd in the back (tow package I think) you need to add a friction modifier or use a diff oil with it already there like royal purple.

I just did both rears in mine and dumped royal purple 75-140 in both, I think the PO had used cheap crap and no friction modifier in the back of the niner and now the LSD in back works much better.
I can think of two tow package equipped ZJs that don't have LSD, one of which is mine. You should have a little tag, if you're the first person to open up the diff, on one side telling you you have 3.73:1 gears and if it's an LSD, there should be a little tag on the other side of the diff cover notifying you of that. If the tags are gone, you can jack up the rear of the Jeep and spin one rear wheel. If the other rear wheel spins opposite of the one you're spinning, you have an open diff and don't need friction modifier. If it spins the same way, you have an LSD and need to use 75W-140 with friction modifier.
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Unread 10-31-2013, 05:49 AM   #26794
95z
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Quote:
Originally Posted by Syncityj View Post
Looking for info on changing gear oil in a 98zj. Front and rear. Anything helps. I don't know where to find the particular diff info. I know I am opening myself to ridicule and rude comments but hey, I need info, so as long as the comments come with answers...bring it on.
Crack em open ,let em dump, wipe it out, look at it, silicone, gasket, silicone, bolt it on, fill er up and hit the trail.
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Unread 10-31-2013, 06:56 AM   #26795
AnotherRedZj
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1997 ZJ 
 
Join Date: Feb 2012
Location: fort walton beach, fl
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Quote:
Originally Posted by Syncityj View Post
Looking for info on changing gear oil in a 98zj. Front and rear. Anything helps. I don't know where to find the particular diff info. I know I am opening myself to ridicule and rude comments but hey, I need info, so as long as the comments come with answers...bring it on.
I'd hit it with some brake clean while its open and take a real good look at your gears looking for chips or unusual wear. Make sure you wipe it all out the bottom and let it dry before you fill it back up. (the brake clean that is, it might take awhile if you wait for any gear oil to dry) ;-)
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Unread 10-31-2013, 07:19 AM   #26796
moparlover1992
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Today I'm getting ready to take her to pick up my bosses 20' flatbed to haul one of my old cars 45 miles to the junkyard. They told me they would give me $300. Then of course I'll try to find things on my 'list' while I'm there lol

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Unread 10-31-2013, 07:32 AM   #26797
SchizophrenicMC
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20' flatbed + old car + 45 miles + towed by a ZJ = god I hope that's lighter than my math suggests.
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Unread 10-31-2013, 09:05 AM   #26798
noodles5124
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Found a set if front upper and lower adjustable arms in eBay for $280 there were good reviews anyone have experience with these? I set a message and asked about the wall thickness and bushings
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Unread 10-31-2013, 09:16 AM   #26799
xrunndonex
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Looked at this wire hanging under the passenger side dash. There's a red blue and black wire wtf is it to
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Unread 10-31-2013, 09:17 AM   #26800
roughknight69
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Quote:
Originally Posted by noodles5124
Found a set if front upper and lower adjustable arms in eBay for $280 there were good reviews anyone have experience with these? I set a message and asked about the wall thickness and bushings
Why not do iro for that price?
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Unread 10-31-2013, 09:54 AM   #26801
noodles5124
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Quote:
Originally Posted by roughknight69
Why not do iro for that price?
Iro is about $360 for a set of 4 vs.$280 shipped
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Unread 10-31-2013, 09:57 AM   #26802
comptiger5000
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Quote:
Originally Posted by SchizophrenicMC View Post
20' flatbed + old car + 45 miles + towed by a ZJ = god I hope that's lighter than my math suggests.
It's probably not, but if he's got trailer brakes, it'll be ok if he loads it well. I pulled another ZJ with mine, about 6300 lbs including the trailer. And I was dumb enough to drive over 350 miles on the highway with it It was definitely pushing the limit of what the ZJ could handle, but it was stable and certainly manageable.
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Unread 10-31-2013, 10:41 AM   #26803
noodles5124
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Quote:
Originally Posted by noodles5124
Iro is about $360 for a set of 4 vs.$280 shipped
Got an email from the seller 3/16" wall structural tubing and poly bushings all greasable seems a bit thin but lifetime warranty on the arms and 5 year warranty on the bushings doesn't seem like a bad idea, good reviews and feedback
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Unread 10-31-2013, 11:48 AM   #26804
moparlover1992
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Quote:
Originally Posted by SchizophrenicMC View Post
20' flatbed + old car + 45 miles + towed by a ZJ = god I hope that's lighter than my math suggests.
I'll post pics. Almost hauled two cars on there lol. Two words. V. 8.

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95 zj 5.2 np242 3.5'' IRO lift, IRO adjustable arms, KOR front trackbar, steering stabilizer and box brace, IRO rear adjustable trackbar, bilsteins, Hughes plenum plate, flow master 40, 31x10.5s on 15'' dc-2 rims
Mopar or no car!
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Unread 10-31-2013, 11:49 AM   #26805
moparlover1992
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Quote:
Originally Posted by comptiger5000 View Post

It's probably not, but if he's got trailer brakes, it'll be ok if he loads it well. I pulled another ZJ with mine, about 6300 lbs including the trailer. And I was dumb enough to drive over 350 miles on the highway with it It was definitely pushing the limit of what the ZJ could handle, but it was stable and certainly manageable.
No trailer brakes that's the worst part. Got to allow for plenty of stopping space lol

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Mopar or no car!
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