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Gear oil in transfer case instead of atf... #5454855 06/15/20 10:41 PM
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Mattz Offline OP
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So here is the scoop...


2011 jeep grand Cherokee Laredo 153xxxkm decided to get the fluid changed in the front and rear differentials along with the transmission fluid and transfer case. Brought it to a repituable shop in town. Anways when I go to pick up the vehicle I noticed they didnt use synthetic gear oil like my manual states to use but a conventional with a additive? Also says I believe 90w oil in my transfer case when my manual says to use atf fluid? Eveything runs and drives fine just was kinda thrown off... should I dump the 90w oil in my transfer case to replace with atf?
Thanks for any imput....

Re: Gear oil in transfer case instead of atf... [Re: Mattz] #5454857 06/15/20 10:49 PM
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Chris142 Online Content
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Yes dump it immediatly! The pump in the transfercase is not designed to pump gear oil. It is designed to pump a thin atf.


02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
07 fjcruiser Car lube plus 10w30
Z400 castrol T 10w40
Can am Maveric edge 5w40
57 case tractor Chevron sae30
Re: Gear oil in transfer case instead of atf... [Re: Mattz] #5454882 06/16/20 12:42 AM
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dubber09 Offline
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So much for 'reputable' shop that doesn't follow manufacturer's recommendations or requirements, they are not that smart either since this opens up a chance for a law suite which may simply bankrupt them.


Kia Sportage 2014 GDI 2.4L
Kia Forte 2014 MPI 1.8L
Re: Gear oil in transfer case instead of atf... [Re: Mattz] #5454889 06/16/20 01:22 AM
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Black_Thunder Offline
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its possible they made a mistake on the documentation but indeed at least check the fluid to see if it is indeed 90 weight thats in it


I'd buy Callahan autoparts if I could.
Re: Gear oil in transfer case instead of atf... [Re: Mattz] #5454918 06/16/20 04:55 AM
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dlundblad Offline
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I’d have them dump it. Honestly, you’re going to need to do a few drain and fills so might as well have them do the first to flush it out.


03 Jeep WJ 4.0 208k
02 Volvo S60 2.4T 199k
97 Chevy Blazer 4.3 175k
04 Audi A4 3.0 210k

Re: Gear oil in transfer case instead of atf... [Re: Mattz] #5454989 06/16/20 07:36 AM
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Snagglefoot Online Content
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This is off a 2011 Grande Cherokee owners manual and should also apply to the Laredo AFAIK. It agrees with the OP’s assessment.

35B9D7EB-8DEF-4E8B-9945-955B824EE7CC.png

If you want the job done right......do it yourself.
Re: Gear oil in transfer case instead of atf... [Re: Mattz] #5454995 06/16/20 07:50 AM
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Snagglefoot Online Content
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In 2011 Jeep changed the transfer case supplier to Magna Power Train, which manufactured the MP series of transfer cases. They all use ATF. GM was also using them.
smile


If you want the job done right......do it yourself.
Re: Gear oil in transfer case instead of atf... [Re: Mattz] #5454997 06/16/20 07:53 AM
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Snagglefoot Online Content
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Here is some info. www.wk2jeeps.com/wk2_tcases

BE1C06B1-A493-434C-9D28-FBBCFA20A943.png
Last edited by Snagglefoot; 06/16/20 07:56 AM.

If you want the job done right......do it yourself.
Re: Gear oil in transfer case instead of atf... [Re: Mattz] #5455267 06/16/20 01:41 PM
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nascarnation Offline
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In this modern era, I'm surprised that most shops don't have some system where you scan the vehicle bar code or input the VIN or at least the model and it prints you a list of lubes and capacities.

My use-at-home Blue Driver scanner which was maybe a hundred bucks (?) lets you grab the VIN with phone camera and it knows exactly what the vehicle is. So it's not exactly mega dollar data base stuff. If you prevented one screw up like the OP describes, it's probably paid for.

Last edited by nascarnation; 06/16/20 01:42 PM.
Re: Gear oil in transfer case instead of atf... [Re: Mattz] #5455503 06/16/20 06:43 PM
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Mattz Offline OP
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Updated...

I called the shop this morning I explained my concerns.. he talked about how 80 or 90 w oil once it warms up is thin and he thinks transmission fluid is too thin he claims it's like water. Anways he said to make my mind at ease to bring it in the morning and [censored] dump it and put the aft fluid in it.. I asked if he thought the aft was too watery or thin why would to factory use it? Anways now my question is how many drain and fills until this crap is out?

Re: Gear oil in transfer case instead of atf... [Re: Mattz] #5455650 06/16/20 10:15 PM
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zrxkawboy Offline
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Originally Posted by Mattz
Anways now my question is how many drain and fills until this crap is out?


Just one should do it.


"Think of all the Ford owners who will someday want an automobile." John Dodge

Re: Gear oil in transfer case instead of atf... [Re: Mattz] #5455763 06/17/20 04:47 AM
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dogememe Offline
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Originally Posted by Mattz
Updated...

I called the shop this morning I explained my concerns.. he talked about how 80 or 90 w oil once it warms up is thin and he thinks transmission fluid is too thin he claims it's like water. Anways he said to make my mind at ease to bring it in the morning and [censored] dump it and put the aft fluid in it.. I asked if he thought the aft was too watery or thin why would to factory use it? Anways now my question is how many drain and fills until this crap is out?


Sounds like it's time for a new shop.


2010 Ford Escape 2.5 ~104K Miles: AMSOIL Signature Series 0W-30, Wix Filter.
2001 Chevy Suburban 5.3 ~293K Miles: Valvoline Maxlife 10W-30, ACDelco Filter.
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