5 speed transmission fluid question - Page 2 - JeepForum.com

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post #16 of 23 Old 08-25-2011, 11:38 AM Thread Starter
02grandy
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does gear oil/fluid go bad?

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post #17 of 23 Old 08-25-2011, 11:41 AM
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Originally Posted by 02grandy View Post
does gear oil/fluid go bad?
Huh? Like being used or just sitting out? It doesn't go stale like bread but the longer it is introduced to an environment, the more of a chance it has to collect contaminants. Just make sure you check the fluid for water or any other floating or sinking debris before adding to your jeep.

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post #18 of 23 Old 08-25-2011, 11:44 AM Thread Starter
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the fluid i used is Castrol Hypoy C gear oil SAE 80w/90 and says limited slip performance its from the early 2000's
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post #19 of 23 Old 08-25-2011, 12:12 PM
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To my knowledge limited slip additives are dangerous to transmissions. They also contain detergents which cause wear. Take that stuff and throw it in your diffs. Buy something else for the tranny. I would suggest 10w30 but if its gotta be gear oil, refer to your owners manual.

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post #20 of 23 Old 08-30-2011, 11:07 AM
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Gear Oil

I bought a 94 Wrangler from a friend last May. I had it a few weeks and the shifting strted getting difficult. Have to double clutch at times when down shifting. Shifting up is no problem. I finally crawled under the YJ on Sunday and replaced the gear oil. What drained out was dark and it smelled. I replaced it with regular gear oil 80/90. It still shifts fine going up, but coming back down requires a double clutch unless I can synchronize the rpms and pull it down without it grinding.
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post #21 of 23 Old 08-30-2011, 11:26 AM
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I was trying to change my pluid this past weekend, but I just could not figure out how to fill it.
My manual shows a drawing of the trans so lacking in detail that you can not tell which side you are looking at.
But the drawing shows 2 bolts, the upper of the two being for filling. I can't see the two bolts anywhere.
So, is the filler on the Drivers side or the passenger side? Anyone got a photo?

I know I am a wimp, but doing anything to the trans sort of scares me.

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post #22 of 23 Old 08-30-2011, 11:56 AM
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MeanMax has a writeup that's stickied in the FAQ. It helped me out.

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post #23 of 23 Old 09-01-2011, 08:16 AM Thread Starter
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so is that fluid i added bad for the ax5 trans?
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