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Old 05-07-2020, 09:45 PM   #1
Cpuckett
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Default 31 Model A rear end

Question, when replacing the gaskets on the axel housings after setting the gearing up whatís the best gasket sealing to use?
Thanks
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Old 05-08-2020, 04:53 AM   #2
john charlton
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Default Re: 31 Model A rear end

I have never used a sealer on the banjo gaskets or the banjo bolts and never ever any leaks over 30 plus years . I oil the gaskets with a very light oil prior to fitting and removing refitting etc etc to set the ring gear mesh and preload .Be aware the banjo bolts are a precision item they are a machine fit in the trumpet ends and should not need sealer but maybe a dab of LOCTITE SI 5926 would do no harm up to you . I do have a car with one or two bolts with the trace of a weep, axle done years ago . Other posters might do it differently but this works for me .

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Old 05-08-2020, 07:58 AM   #3
Joe K
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Default Re: 31 Model A rear end

Light coat of spray Permatex 80065 on both gasket & surfaces. This more a contact cement than sealant.

SOME sort of RTV on the bolts. And yes. High class fit bolts only.

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Old 05-08-2020, 08:30 AM   #4
rotorwrench
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Default Re: 31 Model A rear end

Some folks still use Indian Head Shellac. Some just put a bit of grease on them. In any case, a person doesn't want to add any thickness to it if the carrier preload is good.
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Old 05-08-2020, 10:06 AM   #5
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Default Re: 31 Model A rear end

Quote:
Originally Posted by Cpuckett View Post
Question, when replacing the gaskets on the axel housings after setting the gearing up whatís the best gasket sealing to use?
Thanks
I don't use any.
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Old 05-08-2020, 10:29 AM   #6
BRENT in 10-uh-C
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Default Re: 31 Model A rear end

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Quote:
Originally Posted by Cpuckett View Post
Question, when replacing the gaskets on the axel housings after setting the gearing up whatís the best gasket sealing to use?
Thanks
Generally speaking, the reason you would use a gasket sealant is to make up for bent/uneven/damaged gasket sealing surfaces. Correcting those issues when doing the rear end assemble rebuild eliminates leaks, along with the need for gasket sealers.

Below are a few pictures showing how the axle housing gasket surfaces should be repaired. Use a file on the differential housing to remove the 'proud areas' around each bolt hole, and then follow-up with a hand countersink to clean the perimeter. Don't forget to check run-out in the entire housing itself to ensure the hubs will be in-line with the centerline of the rear end assy.


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Old 05-08-2020, 11:12 AM   #7
redmodelt
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Default Re: 31 Model A rear end

After cleaning any burrs around the edges I use this stuff. It fills the voids and does not add to thickness. Looking at the web site I see it can't be sold in several states; This item has been restricted from sale in the following states: CA, CT, DE, IL, MA, MI, OH, and RI.

https://www.grainger.com/product/2GX...g!438996414705!
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Old 05-08-2020, 12:02 PM   #8
Bob C
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Default Re: 31 Model A rear end

Must be good stuff if it can't be sold in CA.
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Old 05-08-2020, 01:35 PM   #9
rotorwrench
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Default Re: 31 Model A rear end

Just about everything has some kind of warning on it now days.
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Old 05-08-2020, 09:37 PM   #10
Cpuckett
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Default Re: 31 Model A rear end

Thanks for all the feedback
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Old 05-09-2020, 09:59 AM   #11
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Default Re: 31 Model A rear end

None.
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