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Unread 11-01-2011, 06:10 PM   #1
brycherokee87
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Wj TCase fluid change?

I plan on changing out my TCase fluid on my 02 grand Cherokee. It's a 4.0 with select trac, does any one know what the correct fluid is to use? And would you have any tips for me since I will be doing it myself. Thanks

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Unread 11-01-2011, 07:51 PM   #2
xJoshxx
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ATF+4 transmission fluid takes about 2 quarts, I believe the drain bolts are 10mm Hex. ALWAYS TAKE THE FILL PLUG OUT FIRST.
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Unread 11-01-2011, 08:15 PM   #3
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Quote:
Originally Posted by xJoshxx
ATF+4 transmission fluid takes about 2 quarts, I believe the drain bolts are 10mm Hex. ALWAYS TAKE THE FILL PLUG OUT FIRST.
X2, while I did remember to take the fill out first, the drain plug was absolutely and completely stuck in there. Ended up soaking it in PBBlaster and tapping it with a hammer, took me at least an hour of this process every 15 minutes to get it out.

If yours is stuck in there, make sure when you're twisting the life out of it, that you aren't bending the hex shape, I bent mine a tiny bit and realized I was doing it so backed off and repeated the PBBlaster procedure.

Also, when putting them back on, I put a little bit of anti-seize on the threads, just a little gift to yourself a couple years down the road when changing the fluid again.
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Unread 11-02-2011, 02:24 AM   #4
bowring23
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the mopar fluid from the dealership is what i used atf-4. it isnt even that much i just went there and picked some up i think i paid 20$ its about 8$ a quart
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Unread 11-02-2011, 04:52 AM   #5
Farlander
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If the plug was really frozen in there then it needed to be changed bAd! Yes any old ATF will work the dealer charges way too much but it's nice to have a quart bottle with a pointed nozzle or other kind of pump machine because getting the fluid into that fill hole can be a *****. Same with the differentials!
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Unread 11-02-2011, 06:09 AM   #6
AngryScientist
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a small pump is the easiest way to get the fluid into the transfer case, like the one below (with a hose on it...):

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Unread 11-02-2011, 07:02 AM   #7
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Quote:
Originally Posted by Farlander View Post
If the plug was really frozen in there then it needed to be changed bAd! Yes any old ATF will work the dealer charges way too much but it's nice to have a quart bottle with a pointed nozzle or other kind of pump machine because getting the fluid into that fill hole can be a *****. Same with the differentials!
NO not "just any old ATF" will work,

needs to be ATF+4 for the 242 and mopar fluid for the 247
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QUOTE=billzcat1;wsar10 is right on point on this oil thread - as usual. Anyone reading this would be well-served taking his advice.


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Unread 11-02-2011, 10:30 AM   #8
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Those little pumps are a life saver! I saw them at NAPA the other day.
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Unread 11-02-2011, 11:23 AM   #9
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Quote:
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Those little pumps are a life saver! I saw them at NAPA the other day.
yup, did the transfer case and both diffs with it, works great.
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Unread 11-02-2011, 12:13 PM   #10
WiCkeDuDe
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It doesnt have to be ATF4+. Thats just the Jeep marketing dept saying that. Pretty much any ATF will work.
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Unread 11-02-2011, 12:24 PM   #11
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the 242 in the WJ needs the added viscosity and friction modifiers of the ATF+3,4 in which was designed specifically for Chrysler clutch packs. and with ATF+4 being designed to have a higher TBN (if you will)(last longer) and made to flow better at cold temps why would you not use it ?

I cant imagine somebody not using a recommended formula in anything on a Jeep, let alone trying to argue the point on JF


http://www.allpar.com/mopar/transmissions/fluids.html
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QUOTE=billzcat1;wsar10 is right on point on this oil thread - as usual. Anyone reading this would be well-served taking his advice.


-03 WJ laredo 4.0 120k a few minor mods
-93 XJ 5spd, 3" zone lift

Last edited by wsar10; 11-02-2011 at 12:24 PM.. Reason: found a link
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Unread 11-02-2011, 12:32 PM   #12
WiCkeDuDe
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There are no clutch discs in a 242.
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Unread 11-02-2011, 12:41 PM   #13
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this is something i really should do to both of my WJ's! great to know about those pump things. will have to look around for those!
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Unread 11-02-2011, 12:57 PM   #14
wsar10
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Quote:
Originally Posted by WiCkeDuDe View Post
There are no clutch discs in a 242.
I did not state there was.
It is probably needed in the 242 due to the types of metals that are used.

Look you would obviously love to argue with somebody, but i'm just not up for it today, put whatever you want in your truck, scrap you TC, it makes no diff. to me !
I personally will use what is supposed to be used for the reason that the factory uses it, the proper fluid with the proper add pack.
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QUOTE=billzcat1;wsar10 is right on point on this oil thread - as usual. Anyone reading this would be well-served taking his advice.


-03 WJ laredo 4.0 120k a few minor mods
-93 XJ 5spd, 3" zone lift
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Unread 11-02-2011, 01:12 PM   #15
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well, just for the record, my 2000 select trac t-case is capable of using just about any atf, this from the factory manual. my truck was made before atf+4 came out, and the owners manual tells me to use dex-3 atf or atf+3 - in other words, pretty much any ATF. when atf+4 came out, Jeep just specified it in all select trac cases. the cases are the same, so whatever you put in them will be fine.

it's easy enough to find atf+4 though, so thats what i used.
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