Rear End Gear Oil - Ford Powerstroke Diesel Forum
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post #1 of 3 Old 07-20-2010, 06:10 AM Thread Starter
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Rear End Gear Oil

I have a 2008 F350 that is leaking a little rear end oil. I pulled the square plug on the back side half way up the diff cover and found it is a inch or so low. I assume I need to bring it up level with the bottom of the hole. What oil did Ford originally use in these trucks? I have the dually with 3:73 gears.

As soon as I return from this trip I am going to take it to the dealer and have it fixed.

Any help would be appreciated.

thanks
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post #2 of 3 Old 07-20-2010, 06:14 AM
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There should be a tag on the rear axle that tells you what fluid. If you have the 10.5 inch axle it takes75w-140. If you have the dana m80 it takes 75w-90.

-John
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post #3 of 3 Old 07-20-2010, 12:06 PM
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Make sure and use synthetic fluid!

2008 F450 Lariet CC 4x4 dually 6.4 diesel
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