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Old 03-28-2012, 12:36 PM   #1
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That's the fluid i bought for my 2010 rubicon. Do i still need to add the additive for trac-lok even tho the bottle says "limited slip"? The guys at auto parts store were useless.
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Old 03-28-2012, 01:30 PM   #2
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I'm pretty sure that the spec calls for 75W-90 and 75W-140 for towing. That appears to have the LSD additive, however it is unnecessary for a Rubicon because you do not have the Trac Lok LSD.

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Old 03-28-2012, 01:45 PM   #3
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I looked on my manual and it says to use 80w-90 and ur right 75w-140 for towing. However on a diff thread i was told that i had to put the additive since i have a rubi. I did think it was weird tho that it didnt mention anything about trac-lok on my build sheet. However, will it hurt anything if i use the oil wit the additive even if i dont need it? Heres my build sheet:
A7 Cloth Low-Back Bucket Seats
-JJ Dark Khaki/Medium Khaki
AEM Dual Top Group
AHT Trailer Tow Group
AJP Power Convenience Group
APAS Monotone Paint
BAES 140 Amp Alternator
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BNMP Traction Control
BNSP Electronic Roll Mitigation
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CDBS Reclining Front Seats
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CFMS Rear Folding Seat
CGXS RR Head Restraints Outboard Seating
CG3S Advanced Multistage Front Air Bags**
CJ1 Supplemental Frt Seat Side Air Bags
CKES Front Seat Area Carpet
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CKTS Cargo Tie Down Loops
CLCS Front Floor Mats
CLMS Sport Bar w/Full Padding
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CS2P Freedom Panel Storage Bag
CUFS Full Length Floor Console
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DEH 6-Speed Manual NSG370 Transmission
DHWS 4:1 Rock-Trac HD Part Time 4WD Sys
DJSS Next Gen. Dana 44 HD Front Axle
DMFS 4.10 Rear Axle Ratio
DRZS Next Gen. Dana 44 HD Rear Axle
DSES Tru-Lok Front & Rear Axles
EGT 3.8L V6 SMPI Engine
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GCBS Front Door Tinted Glass
GCD Deep Tint Sunscreen Windows
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GXMP Remote Keyless Entry
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Engine EGT- 3.8L V6 SMPI Engine
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Old 03-28-2012, 01:49 PM   #4
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Dags right, you don't need to add anything, but

The manual calls for synthetic fluid for doing any towing- !!

Not that it won't work, but if you're worried about additives--should use the recommended diff oil, if you're gonna tow !

I use the Valvoline 75w-140 syn.

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Old 03-28-2012, 01:54 PM   #5
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Rubicons have lockers, not LSD. The additive won't hurt anything. I also use synthetic in my diffs. I prefer Royal Purple.
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Old 03-28-2012, 01:56 PM   #6
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Quote:
Originally Posted by JIMBOX
Dags right, you don't need to add anything, but

The manual calls for synthetic fluid for doing any towing- !!

Not that it won't work, but if you're worried about additives--should use the recommended diff oil, if you're gonna tow !

I use the Valvoline 75w-140 syn.

JIMBO
I dont plan on doin any towing, so hopefully i wont need synthetic. As for the additive, do u kno if it will cause any damage since its already in the oil im using?

EDIT: nvm daggo just answered before i posted. Thanks a lot guys
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Old 03-28-2012, 01:57 PM   #7
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It will not harm anything.
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Old 03-28-2012, 01:59 PM   #8
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LSD uses a clutch. The additive is a friction reducer to help prevent wear on that clutch. Less friction in your differential is always a good thing.
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Old 03-28-2012, 02:04 PM   #9
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Quote:
Originally Posted by daggo66
LSD uses a clutch. The additive is a friction reducer to help prevent wear on that clutch. Less friction in your differential is always a good thing.
Gotcha. Thanks for the info!
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Old 03-28-2012, 08:51 PM   #10
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So after the lil leak wit the stock cover, i put the new ARB cover on. Cleaned it all out wit break cleaner and put 2 quarts of the stuff i pictured in my previous post. Checked for leaks and all seemed fine. However, when i drive i hear a metal crackling noise coming from backs there. Like the noise a burning log makes, except metal (if that makes any sense). Any ideas what the prob could be?


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After new cover was put on
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Old 03-28-2012, 08:55 PM   #11
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It could be because you didn't put enough fluid in the rear. It takes 2.375 quarts.
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Old 03-28-2012, 08:56 PM   #12
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Old 03-28-2012, 09:04 PM   #13
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FYI - I wouldn't use brake cleaner inside my diff. There is really no need to fully remove all the old oil. If you are anal about cleaning it - fill, drive, drain, fill.

As for the noise. Not sure. Could be level related as daggo66 stated, but wouldn't think it. Anything hitting the new cover? Have you tried locking your axle then unlocking to see if the noise remains?
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Old 03-28-2012, 09:11 PM   #14
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Quote:
Originally Posted by Ruthless Reign View Post
...i put the new ARB cover on...However, when i drive i hear a metal crackling noise coming from backs there. Like the noise a burning log makes, except metal (if that makes any sense). Any ideas what the prob could be?...
In the past, some had problems with their ARB covers and interference with Rubicon lockers/gears. I think they solved the problem. Is your cover brand new?
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Old 03-28-2012, 09:14 PM   #15
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Ok so no more using brake cleaner. Ill add some more oil tomo wen the store opens. And no i didnt lock me axles as i didnt want to mess around with it too much and eff it up. Yes the cover is brand new and i called arb prior to buying it to ensure it would work with my rubi.
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Old 03-28-2012, 09:20 PM   #16
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What if i put too much rtv seal and some got in there?
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Old 03-28-2012, 09:22 PM   #17
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You should try to fill your diffs on a sloped driveway-that way you can always get 3 to 5 oz MORE oil in the diff-

Each time I've filled my D44s, I've doneit that way and they are still whisper quiet-

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Old 03-28-2012, 09:24 PM   #18
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You would have had to put a ton on there to be an issue. All it needs is a thin bead.
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Old 03-28-2012, 09:30 PM   #19
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What if i put too much rtv seal and some got in there?
Was there a fiber gasket? I always prefer a gasket to a "liquid" gasket like RTV since a lot are not oil compatible. If your surfaces are flat and free of nicks, and you torque properly, a paper gasket will seal just fine.

Don't let that worry you though. I am sure you aren't the first using RTV and pushing some small amount into the diff

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