Correct color for rear axle bump stops

Discussion in 'Original Drivetrain Topic' started by donaz, May 31, 2009.

  1. donaz

    donaz Veteran Member

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    did the brackets for the rear axle snubbers get painted red primer with the body or were they added during assembly and have a semi gloss black finish?
     
  2. 70 SS/L78

    70 SS/L78 Veteran Member Lifetime Gold Member

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    The body was just a shell and it was dipped in primer. They were added during the assembly process. I seem to think it was some other type of coating.... like zinc phosphate but i'm not sure on this, just making an educated guess.
     
    Last edited: Jun 1, 2009
  3. CamarosRus

    CamarosRus Veteran Member

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    Painted Semi-Gloss black..........ala Rustoleum 7777 or Krylon 1613......or better yet a catalized single stage pro paint from a gun
     
  4. dkatap

    dkatap Veteran Member Lifetime Gold Member

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    I believe the brackets were bolted on the body before it was dipped in red oxide on Norwood cars. Brackets should be red oxide with body color overspray on them. Rubber was installed later. Not certain about LA cars.

    Dennis
     
  5. CamarosRus

    CamarosRus Veteran Member

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    Dennis, Thanks for correcting me. Below is picture of Jack's survivor Norwood 70 Z. I believe you can see where factory undercoat is on top of factory red oxide. On Jacks car it is hard to see where H.O. overspray is on top of Red Oxide primer........

    Also pic of Phil Borris's 70 COPO Z (Norwood) restored..........



    [​IMG]

    [​IMG]
     
    Last edited: Jun 2, 2009
  6. 70COPO

    70COPO Moderator Lifetime Gold Member

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    Picture above was before I located the NOS Muffler..:bowtie:
     
  7. CamarosRus

    CamarosRus Veteran Member

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    Phil, Why is your bump stop metal bracket and rubber, different than Jack Seymours and my Norwood 70 Z. Both cars 1970 Norwood !!!!!!!!!!
     
  8. 70 SS/L78

    70 SS/L78 Veteran Member Lifetime Gold Member

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    I noticed that also.... Looks like Phil's version would be easier to install on the assembly line?
     
  9. M21RSZ28

    M21RSZ28 Veteran Member

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    1970 1st Design Rear Spring Bumper And Bracket

    1970 1ST DESIGN REAR SPRING BUMPER AND BRACKET

    3980939 - BRACKET (press in type bumper)

    3980937 - BUMPER (press in type)

    1971 2nd DESIGN REAR SPRING BUMPER AND BRACKET

    480718 - BRACKET (bolt on style bumper)

    480717 - BUMPER (bumper w/ stud - bolt on style)


    1970 ASSEMBLY MANUAL SHOWS THE “937” BUMPER AND “939” BRACKET REVISED TO “480718” BRACKET AND “480717” BUMPER
    WITH A REVISION DATE OF 3-12-70 - THIS REVISION DATE IS A PAPER DATE CHANGE ONLY

    1970 CHEVROLET PARTS HISTORY CATALOG SHOWS THE 3980939 BRACKET AND 3980937 BUMPER DISCONTINUED 3-70

    HOWEVER THE CHANGE FROM 1ST DESIGN PRESS IN BUMPER TO 2ND DESIGN BOLT ON BUMPER DID NOT OCCUR UNTIL LATE
    IN ASSEMBLY LINE PRODUCTION FOR THE 1970 MODEL YEAR

    MY 1970 CAMARO BUILT IN VAN NUYS ON JUNE 11 1970 HAS THE 1ST DESIGN BRACKET AND BUMPER
    NOTE THE BRACKET IS PAINTED THE STANDARD GM BLACK USED ON AL GM BRACKETS

    1971 CAMARO ASSEMBLY MANUALS SHOW THE 2ND DESIGN BRACKET AND BUMPER

    M21RSZ28


    [​IMG]
    [​IMG]
     
    Last edited: Jun 2, 2009
  10. CamarosRus

    CamarosRus Veteran Member

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    M21RSZ28, I knew you'd have a 2nd design answer......................

    I have to check my BOXES of stuff, but I'm fairly certain that my 07E (last week of 70 production) Norwood Z has the FIRST DESIGN...........

    Very interesting how we are just NOW noticing so many 2nd design parts.
    Most of this is due to M21RSZ28's insight.................
     

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