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10-04-2007, 11:43 AM
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#1
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Registered User
Join Date: Sep 2007
Location: Allentown, PA
Posts: 59
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10W30 in my Manual Transmission?
So I went to AA to buy some GL-3 gear oil 75W-90 Gear oil for my manual Transmission like it says to use in the Manual, but all I could find was GL-5, so I sucked it up and went to the dealership and asked for the oil for my transmission. Well, he comes out with 10W30 and shows me a Service Bulletin that says...
"04897622AA is a 75W90 oil. 04761839AC is 10W30 oil. The 04761839AC is recommended to be used in place of 04897622AA for improved transmission shift properties"
So, I bought myself some royal purple 10W30 and I'm going to put that in. Seems awfully thin to me but if the chrysler boys are recommending it, there must be a reason... Unfortunately the search here kind sucks, so I wasn't able to find any good info on this, although I'm SURE I'm beating a dead horse and/or ressurecting a commonly debated item.
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2008 JK X Project.
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10-04-2007, 11:45 AM
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#2
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Registered User
Join Date: Sep 2007
Location: Allentown, PA
Posts: 59
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Oh, he also told me to use regular old Dextron II/III Auto transmission fluid for my transfer case... Sound about right? That's what the manual says too.
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2008 JK X Project.
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10-04-2007, 12:43 PM
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#3
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Registered User
Join Date: Sep 2006
Location: Illinois
Posts: 5,320
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this has been discussed several times recently. Yes you can use it. But if your looking for a quality GL3 gear oil, take a look at Redline products. MT90 is some good stuff.
Also yes, the transfer case doesn't really care what auto trans fluid is in it. Dex III is just fine.
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'00 Sport. 5-speed, Detroit TrueTrac Dana 44 rear, Detroit TrueTrac front, 4.10's, 2" RE BB, OME shocks, 31" BFG MT, JKS Quicker Disco's, Borla
'99 Z28 M6, some goodies
'94 'Vette, A4 all stock
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10-05-2007, 08:58 PM
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#4
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Registered User
Join Date: Oct 2007
Location: , Missoula, MT
Posts: 402
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not sure i'd use the dexron stuff in the t-case... everywhere I've read says to use the ATF+4
I bought some from wally world the other day, and it's the MOPAR branded stuff too
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10-06-2007, 06:14 PM
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#5
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Registered User
Join Date: Jan 2006
Location: Santa Fe, New Mexico
Posts: 7,103
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Quote:
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Originally Posted by redjeepguy1
not sure i'd use the dexron stuff in the t-case... everywhere I've read says to use the ATF+4
I bought some from wally world the other day, and it's the MOPAR branded stuff too
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T-Cases aren't picky. You can run motor oil in there and it will function properly.
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10-06-2007, 11:49 PM
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#6
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Member
Join Date: Apr 2005
Location: Jeffersonton / NOVA, Va
Posts: 410
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Quote:
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Originally Posted by ajmorell
T-Cases aren't picky. You can run motor oil in there and it will function properly.
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X'S 2 BROTHER! 
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10-07-2007, 05:45 PM
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#7
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Registered User
Join Date: Sep 2007
Location: Allentown, PA
Posts: 59
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Quote:
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Originally Posted by o2tj
X'S 2 BROTHER! |
Well I did the change out today, man, there was a LOT of crud on that drain plug, but the good news is that there were no big chunks. I put in some good 10W30, let's hope that lasts me for a while. I also changed both differential fluids, but didn't make it to the transfer case, that's for next weekend maybe. The goo that came out of the front diff looked the worst with a large amount of "glitter" coming out with the really thick blackened, oil. I took some pics of both diffs, I'll post some pics and hopefully I'll be able to shed some insight as to what I have.
Thanks again.
P.S. I'm wondering if it's not my imagination, but it's shifting better, it's running quieter and just feels smoother in general, what a difference.
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2008 JK X Project.
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10-08-2007, 05:31 AM
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#8
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Registered User
Join Date: Jan 2002
Location: Eagle Point Oregon
Posts: 5,345
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You did of course use 90wt in the diffs......
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10-08-2007, 06:20 AM
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#9
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Registered User
Join Date: Sep 2007
Location: Allentown, PA
Posts: 59
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Quote:
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Originally Posted by jeepdaddy2000
You did of course use 90wt in the diffs......
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Yes, I only used the 10W30 in the transmission.
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2008 JK X Project.
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11-05-2007, 07:59 PM
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#10
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Registered User
Join Date: Oct 2007
Location: Michigan
Posts: 30
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wow 10w30 , just dont go for alooooong ride !
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11-05-2007, 10:06 PM
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#11
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Do it right or not at all
Join Date: Jan 2003
Location: Escondido, California, California
Posts: 57,618
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Quote:
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Originally Posted by scott 035
wow 10w30 , just dont go for alooooong ride !
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Why do you say that? 10W-30 motor oil is roughly equivilent to 75W-90 gear lube. 
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10W30 in my Manual Transmission?
