Gears & Axles Driveshafts | Rearends | Differentials | Gears | 12 Bolt | 9 Inch | Dana

what rear fluid to use?

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Old 07-09-2008, 06:04 PM
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Default what rear fluid to use?

do they make synthetic for the 10 rear? what do I need to switch it out? a new gasket? search is being stupid on my computer, can anyone help me?
Old 07-11-2008, 11:01 AM
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diff. cover gasket, and about 2 qts. of sythentic gear oil with no slip additive on your year!
Old 07-11-2008, 02:59 PM
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some posi units don't like synthetic, ie. Eaton..
Old 07-11-2008, 08:48 PM
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Zexels in 99 and up don't like it either. Auburns need non synthetic with additive.
Old 07-12-2008, 01:24 AM
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i use royal purple in mine. fully synthetic and has the posi additive built in. its a little costy tho
Old 07-17-2008, 01:48 PM
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I bought 2 quarts of AMSOIL + their additive, which set me back almost $35.

I found out after the fact that one of my bowling teammates on league is a dealer for them and we got to talking.

Now the reason it's so expensive, he explained, was because it is supposed to last a lot longer. I think he said 100k miles? He also claimed it could drop the temps by 40 degrees.

I went on to ask about the fact that my aftermarket cover does not have a magnet and the assumption is you change the oil out more often since it has easy access to drain/fill.

He claims that I should not have metal shavings because it's due to metal touching which AMSOIL claims does not occur with their gear oil.

I don't want to pay $35 a pop for something that wont perform any better than 5$ a bottle Mobile-1 if I'm not taking advantage of the benefits (I do want to change it once a year).

Anyone have any thoughts or disputes to these claims or opinions?
Old 07-17-2008, 02:23 PM
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just get mobil 1 75 90w oil and u should be fine
Old 07-17-2008, 04:00 PM
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Originally Posted by FLA02TA
I bought 2 quarts of AMSOIL + their additive, which set me back almost $35.

I found out after the fact that one of my bowling teammates on league is a dealer for them and we got to talking.

Now the reason it's so expensive, he explained, was because it is supposed to last a lot longer. I think he said 100k miles? He also claimed it could drop the temps by 40 degrees.

I went on to ask about the fact that my aftermarket cover does not have a magnet and the assumption is you change the oil out more often since it has easy access to drain/fill.

He claims that I should not have metal shavings because it's due to metal touching which AMSOIL claims does not occur with their gear oil.

I don't want to pay $35 a pop for something that wont perform any better than 5$ a bottle Mobile-1 if I'm not taking advantage of the benefits (I do want to change it once a year).

Anyone have any thoughts or disputes to these claims or opinions?

As long as you still have the stock Torsen T2 it came with you should be fine.
Are you using the "Severe Gear" Amsoil, and which weight??

Even though some claim it is best to just use a good mineral based dino gear oil and change it out OFTEN, like I do.

BTW; where exactly do you find Mobil 1 gear oil for only $5.00/bottle??!
Old 07-18-2008, 07:38 AM
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75w-90 was what I used. I think it was just the long-life synthetic.

AutoZone had the Mobile-1 on sale for like $5.99 or so when I was shopping around. Normally it was like $7+ I think.




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