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Ford 9 Inch Gasket Question

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Old Dec 28, 2018 | 03:36 PM
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Ford 9 Inch Gasket Question

Working on getting my 56 F100 back on the road. I'm in the process of replacing the rear wheel bearings and seals along with pulling the pumpkin. I see the outside gasket for sale, but I don't see anything for the smaller center part. Does this require a paper gasket or will liquid gasket work?


Here is a picture of my 56. I've been a member for awhile with several F100's that have since been sold, but this one is for keeps.
 
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Old Dec 28, 2018 | 03:41 PM
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There is a rubber O-ring, that sits in a groove, that seals it. I've never had one leak from that spot, and reused them many times over.
 
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Old Dec 28, 2018 | 03:46 PM
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Okay great, thank you.
 
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Old Dec 28, 2018 | 03:48 PM
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I will also add that typically, unless you're doing a full 3rd member rebuild of the ring and pinion gears, bearings, etc., that is not taken apart there as it is not necessary. You can drop the pumpkin and clean everything real good and put it back together. Be sure to use the soft copper washers that go under the 3rd member retaining nuts. It's something many people will overlook and have oil leaks from around the studs/nuts.
 
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Old Dec 28, 2018 | 03:51 PM
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Great points. I probably just leave that part sealed and clean and replace the outer gasket. I need to order the washers! Thanks for the tip.
 
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Old Dec 28, 2018 | 06:39 PM
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That is a leak from your pinion seal.
 
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Old Dec 28, 2018 | 07:27 PM
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Pic: 4035 is the 3rd member gasket, 4676 is the pinion seal, 4669 is the drive pinion bearing retainer O-ring.

1st pic in post #1: Pinion seal is leaking.


 
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Old Dec 29, 2018 | 03:29 PM
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Hope this isn’t But what is the consensus on how to change the pinion seal?
 
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Old Dec 29, 2018 | 10:00 PM
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I'm interested as well, since it looks like I'll need to replace the pinion seal.
 
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