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Unread 07-07-2011, 07:54 PM   #1
Grand2626
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changing rear differential fluid

So how important is it to change your rear diff fluid? I have a 2004 with 150k and it still has the original fluid with no problems. I have changed the front diff as the cover was easy to remove. The rear diff looks very difficult to remove, almost like you have to remove the gas tank. Any advice on doing this would be great.

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Unread 07-07-2011, 08:00 PM   #2
boomersoonerGC
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If you dont have a lift you can jack up the body and drop the swaybar and get to it. You will need a pump of some kind to fill it.

Not difficult.
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Unread 07-07-2011, 08:00 PM   #3
99JGCWJ
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http://www.jeepforum.com/forum/gtsea...sa=Search#1227

Any of these should answer your question.
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Unread 07-07-2011, 09:31 PM   #4
billzcat1
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Quote:
Originally Posted by Grand2626 View Post
So how important is it to change your rear diff fluid?
Very important. The scary thing is that the MAX service life of the diff fluid is 30,000 miles on the "Service Interval A" (driving like a nun in spring time). I guarantee that when you pull the rear diff cover, you'll find a pile of metal shavings and a very worn ring and pinion. Feel the edges of the gears for sharpness, they will be sharp and this is an indication of excessive wear.

My ZJ had been neglected for a long time and both front and rear diffs were very worn and had lots of metal shavings in the diffs when I changed it.

Changing it is really easy. Just jack the body up a few inches and you will get a lot more access to the diff. You don't need to get it off the ground or anything, just gain 6" of clearance for the rear diff cover.
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Unread 07-07-2011, 09:56 PM   #5
Cowboyup94
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Your WAY over due! change it. just get the proper fluid.
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Unread 07-07-2011, 10:05 PM   #6
WiCkeDuDe
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Be ready for a horrible smell when you pop the cover.
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Unread 07-08-2011, 12:06 AM   #7
BLKWJLTD
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Haha changed my front differential fluid last week and all i can say is wow. The smell was terrible!
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Unread 07-08-2011, 01:54 AM   #8
Thomahawk
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I did it only with a Garage Jack, no need to pull the Sway bar. Come on, it isnt That hard.
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Unread 07-08-2011, 03:45 AM   #9
TomClancy
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Quote:
Originally Posted by 99JGCWJ View Post
http://www.jeepforum.com/forum/gtsea...sa=Search#1227

Any of these should answer your question.
Did you just misspell "fluid?"
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Unread 07-08-2011, 05:05 AM   #10
kfxnando
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Self loosened the sway bar, for ea acess, difficult to get in there with big hands
did NOT remove the tank
get some ratchet sanders, it makes life easier

and yep, that old oil smell bad

enjoy it
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Unread 07-08-2011, 05:47 AM   #11
99JGCWJ
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Quote:
Originally Posted by TomClancy View Post
Did you just misspell "fluid?"
No, I actually only put 1 f in diff.
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Unread 07-08-2011, 09:17 PM   #12
Andymack
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Call the dealer and ask what fluid to put in.
The book calls for 80w90 in my book, but the dealer recommends 75w140 if you want to extend service life of the part or if you drive under severe conditions.
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Unread 07-09-2011, 04:37 AM   #13
Thomahawk
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Quote:
Originally Posted by Grand2626
So how important is it to change your rear diff fluid? I have a 2004 with 150k and it still has the original fluid with no problems. I have changed the front diff as the cover was easy to remove. The rear diff looks very difficult to remove, almost like you have to remove the gas tank. Any advice on doing this would be great.
Do you have the Quadradrive? Then you need to use 75w-140 and add FM.
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2004 Grand Cherokee Overland 4.7 HO Quadradrive
95 ZJ Limited 5.2 Winter Project
Sold 94 ZJ Laredo 4.0 Winter Beater
R.I.P. 2000 Grand Cherokee Limited, 4.7 V8, Quadradrive, Shale Green Metallic, Agate/Carbon interior, Well modded and highly missed :(

Buildthread [url]http://www.jeepforum.com/forum/f197/jeep-norway-2th-buildt-overland-upgrade-1813490/[/url]

MONEY WILL CONTINUE TO BE THROWN INTO THE RIG UNTIL CONDITION AND SATISFACTION IMPROVES!!!
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Unread 07-09-2011, 06:33 AM   #14
tjlmbklr
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Quote:
Originally Posted by BLKWJLTD View Post
Haha changed my front differential fluid last week and all i can say is wow. The smell was terrible!


I am guessing it's something close to the smell as the tcase. I just swapped mine and had it split open (old and new) and that smell is horrible)
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Unread 07-09-2011, 06:36 AM   #15
tjlmbklr
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Quote:
Originally Posted by kfxnando View Post
Self loosened the sway bar, for ea acess, difficult to get in there with big hands
did NOT remove the tank
get some ratchet sanders, it makes life easier

and yep, that old oil smell bad

enjoy it
WTF is a ratchet sander?
__________________
Bone Stock 2002 Grand Cherokee Limited
4.7L HO, Changed Stock NV247 Quadra-Drive T-case to a 242 Selec-Trac Shifter and all.
Upgraded my rims to 5 Spoke Rogue from '11 Grand Cherokee
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