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Old 08-04-2011, 09:50 PM
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Join Date: Aug 2011
Location: Irving, Texas
Posts: 29
1994 Jeep YJ

Changing all the fluids this weekend...i know the 4.0 takes 10w30....front and real transfer cases 75-90 weight oil...its a five speed manual, should i change manual trans. oil in it too...and if so , which oil do i put in it....appeciate the help guys...this is my first jeep...and i don't know its history...seems to run perfect with 128k on it...but i always like to replace belts, hoses, air filter, fluids etc....with a used vehicle....whether it needs it or not....can't take the previous owners word...

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Old 08-04-2011, 09:57 PM   #2
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Location: El Cajon
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10W-30 in the engine. Not sure about tranny or transfer case, but I am using 80wt oil in the diffs.


2.5L Genius of some sort.
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Old 08-04-2011, 10:26 PM   #3
Join Date: Jun 2011
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There's about 20 threads on here none are the same lol take a look around and choose your poison
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Old 08-04-2011, 10:50 PM   #4
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Join Date: Oct 2006
Posts: 100
yup I've heard Redline MT90 supposed to be awesome for the trans...I've changed mine out to 75W-90 only because the local auto shop here doesn't carry Redline products. But so far I've seen people swear by MT90 for both the AX5 and AX15 trans
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