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Old 09-12-2013, 08:59 PM   #1
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Transfer case fluid

When or with how many miles should a transfer case fluid on 04 tj be changed?

How about the differential fluid?

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Old 09-12-2013, 09:03 PM   #2
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I do the t-case and trans every 30k, and the diffs every 10k or so.

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Old 09-12-2013, 09:10 PM   #3
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Thanks for the info. I bought my jeep with 88000 miles i am at 89 now and have no records if the po ever did so I think its a good idea to do it now.
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Old 09-12-2013, 11:50 PM   #4
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Thanks for the info. I bought my jeep with 88000 miles i am at 89 now and have no records if the po ever did so I think its a good idea to do it now.
That is probably a good call. Most people do not change differential and transfer case fluids as it rarely if ever crosses their minds. The first thing I do when I buy a vehicle is to do all the maintenance because rarely are there records if it has been done.
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Old 09-13-2013, 09:06 AM   #5
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Every 10k for diff does not sound right I think
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Old 09-13-2013, 09:10 AM   #6
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Every 10k for diff does not sound right I think
it's pretty close to factory maintenance schedule "B", which calls for every 12k.
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Old 09-13-2013, 09:20 AM   #7
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Got it thanks
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Old 09-13-2013, 11:07 AM   #8
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Every 10k for diff does not sound right I think
That's almost every oil change, synthetic oil at 7500...
I do diffs at 50-60k especially with a vehicle that's does not drive their car truck hard, towing etc.
I used to do my sti at every 90k but that was highway and 30-40k miles a year
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Old 09-15-2013, 01:05 AM   #9
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What kind of fluid do u use on t-case and diff case?
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Old 09-15-2013, 01:24 AM   #10
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Transfer case = ATF4
Differential = SAE 80W-90 GL5 Gear Oil
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Old 09-15-2013, 12:32 PM   #11
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I though I had a Dana 30 and a Dana 35 just to make sure I contacted Jeep and asked for my build sheet. This is what I have.

DJJS DANA 30/186MM FRONT AXLE
DMEP 3.73 REAR AXLE RATIO
DRKP HEAVY DUTY DANA 44 REAR AXLE
I was surprised. I wanted to change my diff covers to ARB but they are a little expensive for me right now so I might just re use the ones I got.
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Old 09-15-2013, 12:35 PM   #12
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I was surprised. I wanted to change my diff covers to ARB but they are a little expensive
save your money for suspension, SYE/CV shaft, brake upgrades, etc. Those diff covers will create interference issues.
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Old 09-15-2013, 01:00 PM   #13
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Really how so?
I am not getting them. I am going to keep the original ones, clean them up maybe paint them just to give them a face lift, and save my money like you said for something else.
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Old 09-15-2013, 01:01 PM   #14
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Really how so?
I am not getting them. I am going to keep the original ones, clean them up maybe paint them just to give them a face lift, and save my money like you said for something else.
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