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Leaking Rear Diff

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Old Oct 2, 2006 | 05:53 PM
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Leaking Rear Diff

My rear diff looks like it has a major problem. all around the diff looks wet. Anybody have a part number and what kind of fluid to replace it with?
 
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Old Oct 2, 2006 | 07:27 PM
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If you're going to take it off you might want to replace it with a nice Mag-Hytec cover. It's aluminum and hold more fluid. Also comes with a dipstick and o-ring seal. Here's the link: http://www.dieselsite.com/index.asp?...S&Category=465
 
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Old Oct 2, 2006 | 07:48 PM
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Are you leaking from the diff cover or pinion seal? 100% silicone seals the cover instead of using a gasket.
 
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Old Oct 3, 2006 | 02:47 PM
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The Diff cover.
 
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Old Oct 3, 2006 | 03:11 PM
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Anyone know what kind of fluid i should use?
 
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Old Oct 3, 2006 | 05:34 PM
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SAE 80W-90 Premium Rear Axle Lubricant or SAE 75W-90 Synthetic Rear Axle Lubricant
 
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Old Jan 31, 2007 | 06:26 PM
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I've seen posted to use 75W-140 synthetic rear axle lubricant ???
 
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Old Jan 31, 2007 | 07:06 PM
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My 2000 had pinholes in it by 2005 but good news 27 dollars from ford dealer and some RTV and 15 minutes later good to go.I used the 75-90 synthetic but had an open diff I think it makes a difference.
 
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Old Jan 31, 2007 | 09:03 PM
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For single rear wheel use only synthetic 75-140 Use the "Right stuff" gasket maker in a cheese whiz can..never leak. Stay away from the other silicone junk.


Dick
 
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Old Jan 31, 2007 | 09:41 PM
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Don't forget the friction modifier if it is equiped with a LS unit, or the next post will be regarding the rear axle "shudder".
 
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Old Jan 31, 2007 | 09:54 PM
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thanx for the info 99f350sd .. i'm going to be servicing my rear diff soon !
 
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