T-case and diff fluid for 04 WJ? - JeepForum.com
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post #1 of 14 Old 03-08-2021, 10:34 AM Thread Starter
Valentine1
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T-case and diff fluid for 04 WJ?

Hi everyone,

I have an 04 WJ 4.0 w/ 42re. The only fluid flushes I have not done since owning the vehicle (100k miles) are the diff fluid, t-case and power steering.

The friction modifier posts for the diff fluid are throwing me off TBH..

Can anyone recommend the proper diff fluid and TCase fluid for my vehicle? Nice weather this weekend and I've been meaning to get this done

Thanks as always. Love this forum

Jeff


'04 WJ Special Edition 4.0 w/ 42re. Kumho AT-51's
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post #2 of 14 Old 03-08-2021, 11:49 AM
Sangster
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Which TCase do you have? Selectrac 242? Quadratrac/Quadradrive 247?
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post #3 of 14 Old 03-08-2021, 12:27 PM Thread Starter
Valentine1
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Quote:
Originally Posted by Sangster View Post
Which TCase do you have? Selectrac 242? Quadratrac/Quadradrive 247?


Oops duh that would have helped to include

I havethe quadratrac 247J. Just hopped under and checked
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post #4 of 14 Old 03-08-2021, 03:22 PM
SD Overland
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Here are ALL the correct fluid specs for a WJ
http://www.wjjeeps.com/service/maintenance_wj.htm
Do some reading on that website, it has all the answer you seek.

Since you don't have Quadradrive, you do not have vari-lok axles and do not need friction modifier. Assuming your axles are stock, of course.

Your transfer case requires a special oil which you can purchase on Amazon.

2004 WJ Overland 4.7 HO, Quadradrive, Onyx Green Pearl Coat
IRO Rock-Link 3'' front, HD short arms rear, Billstein 5100's
265-70R17 Falken Wildpeak AT3, Spidertrax 1.5'' wheel spacers
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post #5 of 14 Old 04-16-2021, 01:05 PM Thread Starter
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I did my TCase last week and it was simple enough! I'm having trouble though and am psyching myself out on that website linked above.

Looks like for the front, Dana 30 I need SAE 75W-140 Synthetic for a 1999-2004 without Varilock
However the two axels listed for the rear say SAE 75W-140 Synthetic is for heavy-duty or trailer use, and to otherwise use SAE 80W-90.

I did notice my rear axel has that 'tag' on it between two of the bolts.. I was hoping to be able to read it but couldnt.. might have to take it off first to read. Was hoping to get the fluid before taking the cover off as it's my only car and I cant get to Autozone if the cover is off! Lol

Am I reading that correctly? I plan on doing both diff covers tomorrow.

Thanks as always fellas
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post #6 of 14 Old 04-16-2021, 02:36 PM
underscore
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Well do you tow a big trailer or haul heavy loads frequently?

00 WJ
[x] 07 WK CRD/OME/MALONE 1.5 [x] 00 XJ/OME [x] 97 TJ [x] 92 YJ
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post #7 of 14 Old 04-16-2021, 02:57 PM Thread Starter
Valentine1
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Quote:
Originally Posted by underscore View Post
Well do you tow a big trailer or haul heavy loads frequently?
Lol I see where you’re going with this. No I don’t. No hitch at all haha

'04 WJ Special Edition 4.0 w/ 42re. Kumho AT-51's

Last edited by Valentine1; 04-16-2021 at 03:18 PM.
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post #8 of 14 Old 04-16-2021, 06:12 PM
Uniblurb
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Install 75W-140 synthetic in both the front and rear axles. The dealers around here don't even mess with 80-90W gear oil in our axles. Not that they know what they're doing but best to be better prepared for any harsh conditions than under-prepared.
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post #9 of 14 Old 04-17-2021, 08:54 AM
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Quote:
Originally Posted by Uniblurb View Post
Install 75W-140 synthetic in both the front and rear axles. The dealers around here don't even mess with 80-90W gear oil in our axles. Not that they know what they're doing but best to be better prepared for any harsh conditions than under-prepared.

I do the 75-140 synthetic in both front and back of mine. Minimal price difference and no other reason not to. I use the lowest price juice I can find and around here its the Valvoline. I have the 247.
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post #10 of 14 Old 04-18-2021, 07:34 PM Thread Starter
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Thank you fellas! Didn't get a chance to do the diff's this weekend.. went skiing lol. Next weekend! Appreciate your responses!

'04 WJ Special Edition 4.0 w/ 42re. Kumho AT-51's
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post #11 of 14 Old 04-24-2021, 06:30 AM Thread Starter
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Quote:
Originally Posted by blueseasons1 View Post
Quote:
Originally Posted by Uniblurb View Post
Install 75W-140 synthetic in both the front and rear axles. The dealers around here don't even mess with 80-90W gear oil in our axles. Not that they know what they're doing but best to be better prepared for any harsh conditions than under-prepared.

I do the 75-140 synthetic in both front and back of mine. Minimal price difference and no other reason not to. I use the lowest price juice I can find and around here its the Valvoline. I have the 247.

Fellas, I went to autozone today. The Valvoline 75w-140 is plentiful in the 1qt bottles. Every bottle on the shelf says it has the “limited slip modifier”... my question is even without varilock, is that modifier OK for my axles? Not a single 75w-140 on the shelf was plain old synthetic without the limited slip modifier. Maybe I’ll try advance auto parts ?

'04 WJ Special Edition 4.0 w/ 42re. Kumho AT-51's
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post #12 of 14 Old 04-24-2021, 07:38 AM
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Quote:
Originally Posted by Valentine1 View Post
Fellas, I went to autozone today. The Valvoline 75w-140 is plentiful in the 1qt bottles. Every bottle on the shelf says it has the “limited slip modifier”... my question is even without varilock, is that modifier OK for my axles? Not a single 75w-140 on the shelf was plain old synthetic without the limited slip modifier. Maybe I’ll try advance auto parts ?
Your fine having 'Limited Slip Modifier' in your WJ, even if you don't require it.
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post #13 of 14 Old 04-24-2021, 09:53 AM Thread Starter
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Quote:
Originally Posted by JoMc67 View Post
Your fine having 'Limited Slip Modifier' in your WJ, even if you don't require it.
THANK YOU!!! I will go back today to buy it all. Plan is to knock it out tomorrow.

'04 WJ Special Edition 4.0 w/ 42re. Kumho AT-51's
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post #14 of 14 Old 04-25-2021, 04:40 PM Thread Starter
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got'er done today fellas! Both front and rear. Lots of brake kleen, lots of shop wipes, lots of scraping and scuffing.. I ended up using the black RTV because I hate seeing those obnoxious colors on some differentials lol. Valvoline makes these real neat flexible plastic bottles for the stuff to squish it into tight places. 75w-140 was plentiful at Autozone

Magnet in the rear diff wasn't too covered with shavings

I waited entirely too long to do the diffs! Poor Jeep =(
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'04 WJ Special Edition 4.0 w/ 42re. Kumho AT-51's
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