ConcoursMustang Forums

1st Generation 1964 1/2 - 1973 - Questions & general discussions that apply to a specific year => 1970 Mustang => Topic started by: RocketScientist on January 24, 2021, 09:06:23 PM

Title: 70 disc brake backing plate numbers
Post by: RocketScientist on January 24, 2021, 09:06:23 PM
I have seen an number of restored cars having white paint-stamped part numbers on the front disc brake backing plates. They typically have  C9OA-2K00-B for the left side and C9OA-2K004-B for the right side. Did this happen on assembly-line cars or is it something associated with service parts?
Brad
Title: Re: 70 disc brake backing plate numbers
Post by: J_Speegle on January 24, 2021, 11:00:35 PM
Guess your referring to the large black dust shields?

Date coding in stamp form on the back side of drum brake backing plates I've seen and have made but I don't have a picture, recall seeing and no one has mentioned to me about a stamping as you describe related to the disc brake assembly.

Would need to see a picture to comment further or offer an opinion of what they are or where they might have migrated from


Is this the part that your referring to?

(http://www.concoursmustang.com/forum/gallery/15/6-240121215958.jpeg)
Title: Re: 70 disc brake backing plate numbers
Post by: RocketScientist on January 25, 2021, 06:28:04 AM
Yes that is the correct part and the part stamping on the plate is in the area just below the lower control arm.  It is in a difficult spot and I have been unable to ever take pics of it.

Personally, I have doubts to their authenticity but I am curious to know if it is something that has been made up or if part numbers were applied in this area.
Title: Re: 70 disc brake backing plate numbers
Post by: RoyceP on January 25, 2021, 10:53:57 AM
Never have seen that on a car - maybe like you say it is something that appeared on service parts? Fortunately DNO is reproducing them with the Fomoco stamp:
https://www.deadnutson.com/1969-73-disc-brake-driver-side-dust-shield/ (https://www.deadnutson.com/1969-73-disc-brake-driver-side-dust-shield/)

(https://cdn11.bigcommerce.com/s-q45wq/images/stencil/1200x1200/products/726/2813/1969-70_Mustang_Shelby_Disc_Brake_Dust_Shield_Drivers_Side_Drivers_Side_Logo__04638.1518120285.jpg?c=2)
Title: Re: 70 disc brake backing plate numbers
Post by: Bob Gaines on January 25, 2021, 01:29:16 PM
Quote from: RoyceP on January 25, 2021, 10:53:57 AM
Never have seen that on a car - maybe like you say it is something that appeared on service parts? Fortunately DNO is reproducing them with the Fomoco stamp:
https://www.deadnutson.com/1969-73-disc-brake-driver-side-dust-shield/ (https://www.deadnutson.com/1969-73-disc-brake-driver-side-dust-shield/)

(https://cdn11.bigcommerce.com/s-q45wq/images/stencil/1200x1200/products/726/2813/1969-70_Mustang_Shelby_Disc_Brake_Dust_Shield_Drivers_Side_Drivers_Side_Logo__04638.1518120285.jpg?c=2)
A Scott Fuller reproduction product I believe that DNO stocks.
Title: Re: 70 disc brake backing plate numbers
Post by: specialed on January 25, 2021, 06:29:33 PM
There are 2 types or vendors on these square and round fomoco  and a triangle. I have some nos ones and they have a paper c9oz part number but i have never seen an ink stamp c90a # on them  where did u see that ink stamp ?
Title: Re: 70 disc brake backing plate numbers
Post by: RocketScientist on January 25, 2021, 08:35:11 PM
A particular 'concours' mustang restorer (who'll remain nameless) was applying them to his cars but I haven't seen them anywhere else. So it has gotten me wondering.....
If the NOS ones were C9OZ, then this is a further hint that things may not be correct.