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Unread 06-22-2010, 06:18 PM   #1
eas0202233
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what tranny/transfer fluid to use 4.0

I just bought a 93 jeep with the 4.0 and 5 speed. I guess it has the apx15 in it. i want to change my fluid in both and not sure what to buy. I heard 10w30 10w40 for tranny and gear oil. And not sure about the transfer case. Is synthetic better than standard? Is deisel oil better than gas oil.

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Unread 06-22-2010, 06:27 PM   #2
Mean Max
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http://www.jeepforum.com/forum/f12/b...change-865490/

http://www.jeepforum.com/forum/f12/b...change-865520/

http://www.jeepforum.com/forum/f12/b...hange-1009078/

http://www.jeepforum.com/forum/f12/b...enance-728231/

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No one here knows what they are talking about. You should try Pirate 4x4 they will be happy to help you.

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Unread 06-22-2010, 06:32 PM   #3
eas0202233
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now i have 2 questions what ATF to use?? And is synthetic 10w30 better than none?
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Unread 06-22-2010, 06:37 PM   #4
Mean Max
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now i have 2 questions what ATF to use?? And is synthetic 10w30 better than none?
It depends on your conditions & preference in my opinion.

Here in swampy South Florida, water intrusion is a fact of life & happens with almost every outing. Subsequently the fluids are changed often due to the water & not because of their service life.

In drier conditions where water isn't a consideration, higher quality fluids may be preferred.

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