ConcoursMustang Forums

1st Generation 1964 1/2 - 1973 - Questions & general discussions that apply to a specific year => 1967 Shelby => Topic started by: markscustompaint on April 27, 2022, 01:31:06 PM

Title: Finish on the fill plug on rear end housing
Post by: markscustompaint on April 27, 2022, 01:31:06 PM

Hi I have searched and can't find out what the finish on the fill plug on the back of the housing is supposed to be.  Is it painted in place or phosphate and oil?
Thanks,
Mark

Title: Re: Finish on the fill plug on rear end housing
Post by: Bob Gaines on April 27, 2022, 01:54:09 PM

Quote from: markscustompaint on April 27, 2022, 01:31:06 PM

Hi I have searched and can't find out what the finish on the fill plug on the back of the housing is supposed to be.  Is it painted in place or phosphate and oil?
Thanks,
Mark

I have seen them both ways however I believe that they were added after the housing was painted . At the very least unpainted would be more typical then painted. Unpainted I would go with ether P/O or gun blueing .

Title: Re: Finish on the fill plug on rear end housing
Post by: Scott302 on April 27, 2022, 02:46:13 PM

379166-S.  Ford Standard Parts books call for no finish, just plain bare steel.

Title: Re: Finish on the fill plug on rear end housing
Post by: jwc66k on April 27, 2022, 02:53:09 PM

Quote from: Scott302 on April 27, 2022, 02:46:13 PM

379166-S.  Ford Standard Parts books call for no finish, just plain bare steel.

Is paint sprayed into the fill hole acceptable? Was there a masking plug used? The "Ford Standard Parts" reference is after the assembly line and is primarily for replacement parts, but the plug could be bare. A "lite" phosphate and oil would be my preference.
Jim

Title: Re: Finish on the fill plug on rear end housing
Post by: Bob Gaines on April 27, 2022, 02:57:11 PM

Quote from: markscustompaint on April 27, 2022, 01:31:06 PM

Hi I have searched and can't find out what the finish on the fill plug on the back of the housing is supposed to be.  Is it painted in place or phosphate and oil?
Thanks,
Mark

Given your picture shows a stripped /blasted fill plug that is not how a bare steel fill plug looks when first installed. As I mentioned before a P/O (light would be my preference too) or gun blueing will give a finish closer to the way the bolt looked when first installed.

Title: Re: Finish on the fill plug on rear end housing
Post by: markscustompaint on April 27, 2022, 03:35:31 PM

Thanks everyone for the help. 

Title: Re: Finish on the fill plug on rear end housing
Post by: J_Speegle on April 27, 2022, 03:43:23 PM

Quote from: Bob Gaines on April 27, 2022, 01:54:09 PM

I have seen them both ways however I believe that they were added after the housing was painted . At the very least unpainted would be more typical then painted. Unpainted I would go with ether P/O or gun blueing .

+1

Believe originally they were installed after the rearend was filled. This just saved a step so that it didn't need to be removed and reinstalled plus the chance of dropping and losing them during the process