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Old 04-26-2013, 05:47 PM
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nine inch rearend

I have a nine inch rear end out of a 1976 Bronco and apparently an early center section. There is no fill plug in the third member and so I will fill through the vent but my question is how much fluid. My books are telling me 6.5 pints. Anyone know for sure? Tim

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Old 04-26-2013, 09:01 PM
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Different housings take different amounts. They are not made the same. Some are smaller in the middle and some are larger. See if you can find a later chunk and measure the height of the fill plug and put one in yours.
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Old 04-26-2013, 09:44 PM
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2 1/2 Quarts will be just right.
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Old 04-26-2013, 10:57 PM
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Really, don't think I've ever seen a 9" 3rd member with no fill on the left side? Can you drill and put in a pipe plug?
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Old 04-26-2013, 11:27 PM
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The early 9 inch rear ends ('57 through '64) had the fill plug in the back of the housing. There was no plug in the case.

You can't just say that a certain amout will be fine for any 9 inch housing. Some have a full bowl cover on the back that will hold much more oil than the covers that are flat with a bulge for the ring gear. Some housings have a long tapered center and others have a small round center. These will hold different amounts of oil.
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Old 04-27-2013, 10:56 PM
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Quote:
Originally Posted by big gear head View Post
The early 9 inch rear ends ('57 through '64) had the fill plug in the back of the housing. There was no plug in the case.

You can't just say that a certain amout will be fine for any 9 inch housing. Some have a full bowl cover on the back that will hold much more oil than the covers that are flat with a bulge for the ring gear. Some housings have a long tapered center and others have a small round center. These will hold different amounts of oil.
You are correct to a point ,but the last 1500-2000 9" Fords I've done in my shop in the last 30 years,took "about" 2 1/2 quarts,it will be fine at that leval.....believe me...
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