What size allen wrench to drain differential?

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DHort
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What size allen wrench to drain differential?

Post by DHort » Tue Jul 06, 2021 9:50 am

My friend needs to check his differential. I did not realize that a 27 needs an allen wrench to open the drain on his car. Can you tell me what size wrench I need? ........If it has been a long time and it does not want to loosen up, what is the best way to get that loose? I do not know if I want to heat that area or if I should just try an extension (pipe) on the wrench.
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RajoRacer
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Re: What size allen wrench to drain differential?

Post by RajoRacer » Tue Jul 06, 2021 10:16 am

Shouldn't be an allen - isn't it square ? Should just take a 3/8" ratchet.
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Mark Gregush
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Re: What size allen wrench to drain differential?

Post by Mark Gregush » Tue Jul 06, 2021 10:19 am

Should be a square hole, not allen wrench, unless someone has installed a different plug. 3/8" socket wrench should work if square hole.
I know the voices aren't real but damn they have some good ideas! :shock:

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Erik Johnson
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Re: What size allen wrench to drain differential?

Post by Erik Johnson » Tue Jul 06, 2021 10:34 am

The later Ford script adjustable wrenches have a square boss on the end of the handle for use with the Model T and Model A differential plug.
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Mark Gregush
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Re: What size allen wrench to drain differential?

Post by Mark Gregush » Tue Jul 06, 2021 10:36 am

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Last edited by Mark Gregush on Mon Jul 12, 2021 12:16 am, edited 1 time in total.
I know the voices aren't real but damn they have some good ideas! :shock:

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John Codman
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Re: What size allen wrench to drain differential?

Post by John Codman » Tue Jul 06, 2021 10:50 am

Mine may have once been 3/8" square, but it's more like 7/16" now.
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old_charley
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Re: What size allen wrench to drain differential?

Post by old_charley » Tue Jul 06, 2021 10:56 am

Bung wrench. A handy addition to any toolbox!
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Rich Eagle
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Re: What size allen wrench to drain differential?

Post by Rich Eagle » Tue Jul 06, 2021 11:43 am

Standard 1/2" NPT plugs are sold with a 3/8" hex size if that is what is in there.
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DHort
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Re: What size allen wrench to drain differential?

Post by DHort » Tue Jul 06, 2021 3:57 pm

I will have to look closer. Just assumed it was a hole for an Allen wrench. Ratchet will be a lot easier. Thanks everyone.
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Scott_Conger
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Re: What size allen wrench to drain differential?

Post by Scott_Conger » Tue Jul 06, 2021 4:10 pm

deleted due to really wrong information
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