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post #1 of 5 Old 11-04-2010, 02:17 PM Thread Starter
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Gear Oil

So i went to the store, found the row of 80W-90 gear oil that the manual recommends, and grabbed 3. However, whoever was stocking the shelves put an 85w-140 in the mix. stupid me didnt check all three bottles until i got home.

so the question is if i do the majority of the diff with the 2 bottles of 80w-90 and then top off the last 12 oz with the 85w-140 will that be bad? do I just need to go back and exchange it? im asking because the jeeps in the garage with no gear oil and id have to get a ride up there. thanks.

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post #2 of 5 Old 11-04-2010, 02:24 PM
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What's that give you about 82w-110? I'd go for it. I can't imagine it being a problem. The '08 manual calls for 75w-140 rear for towing so you should be fine.

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post #3 of 5 Old 11-04-2010, 02:38 PM
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are they all the same type (synthetic or conventional)? if so, you should be fine. the difference is the 85w-140 gives you protection up to higher temps. the lower viscousity rating (80 vs 85) shouldn't be enough to make any real difference.

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post #4 of 5 Old 11-04-2010, 02:41 PM Thread Starter
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Originally Posted by jkx0778 View Post
are they all the same type (synthetic or conventional)? if so, you should be fine. the difference is the 85w-140 gives you protection up to higher temps. the lower viscousity rating (80 vs 85) shouldn't be enough to make any real difference.
yea theyre both the same type, brand and all, just different viscosity ratings.

thanks for the quick responses guys. this is my first time dealing with gear oil

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post #5 of 5 Old 11-04-2010, 04:48 PM
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Yep, like the others already said, you should be fine!

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