1. TrailBeast

    TrailBeast AKA Mopars4us on Youtube

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    I want to replace my rear brakes and keep running across a confusion of the drums being 9 or 10 inch.
    I'll pull one if needed, but does anyone know for sure if a 73 LH23 Dart Swinger 2 door hard top is 9 or 10?
    It has the original 7.25 with 4.5 bolt pattern, and factory fron discs.

    Thanks
     
  2. abodyjoe

    abodyjoe Well-Known Member

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    best bet is to just measure them...
     
  3. magnumdart

    magnumdart There is a bad moon on the rise.

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    I think you need to measure. What they should be and what someone may have put underneath could be two different things.
     
  4. TrailBeast

    TrailBeast AKA Mopars4us on Youtube

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    Ok, so two people who's oppinion I trust say they couldn't really be sure so I'll pull one and see for myself. :)
    It's also what I would tell someone to do to be sure.

    I actually thought about getting both so I would for sure have the right ones on hand, but it's not a big deal to pull one.

    Thanks for confirming guys.
     
  5. Bulldozer

    Bulldozer free ice cream sandwiches

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    just pull a tire off real quick and measure.

    my money is on a 9"
     
  6. VDART

    VDART Well-Known Member

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    all you have to do is measure the outside drum-- just remove a tire--- the 7.25 I had like that was 10" brakes--

    since you had disc brakes-- that is what my $$ is on.Lawrence
     
  7. krazykuda

    krazykuda Well-Known Member FABO Gold Member How-To Section Editor

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    Cut it in half and count the rings....


    Oh, wait, that only works with trees.....
     
  8. 71beater

    71beater Well-Known Member

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    I could be wrong, but I thought 9" was only on 4 wheel drums, and 4" bolt pattern, and that disc/drum 4-1/2" bolt pattern was was 10" drum.
     
  9. g413

    g413 Well-Known Member

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    When I saw 9 or 10, I knew what your question was about. When I was getting parts for my brake mechanic for my 67 Barracuda, I looked up info in the parts stores. All listings were for only 9" rear brakes. It actually had 10" brakes.

    So I agree, pull the back tire and drum (if possible) and measure the inner diameter. While you're there, measure the width of the brake shoe pad.
     
  10. Dartnut

    Dartnut Don't hate me because i'm beautiful

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    It would have 10'' rear brakes on it.
     
  11. TrailBeast

    TrailBeast AKA Mopars4us on Youtube

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    Ha ha, see what I mean?
    Ill be pulling one in the next day or so and let Y'all know what it is, just for curiosity sake.

    "Count the rings" There ya go. :)
     
  12. Bulldozer

    Bulldozer free ice cream sandwiches

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    I said nine just to make you check lmao
     
  13. TrailBeast

    TrailBeast AKA Mopars4us on Youtube

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    You're like that sometimes. :) (but I appreciate it) because we all know it's always best to look for sure anyway.
    I was glad to see the drums were in nice condition with lots of meat on them.
    A light crosshatch sanding and we're in business.

    They are 10" x 2.5" and Napa has them in stock so I'll pick them up tomorrow and swap em out.

    Thanks guys? :)
     
  14. BigBlockMopar

    BigBlockMopar BigBlockMember

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    You're questioning the actual gender of the above posters? :sign12:


    My '73 318 A/C Dart, when I bought it, had front discs w/4.5" boltcircle and a 7-1/4" axle with 4" boltcircle and unmanly 9" drums.
    Not sure why but someone probably swapped some parts in the past.
     
  15. Dartnut

    Dartnut Don't hate me because i'm beautiful

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    I would bet that your car's rear diff was replaced at some time with an earlier sbp one.
    All a-bodies from '73 to '76 that had bbp front disc brakes from the factory had bbp rear ends in them. Some were 7 1/4'' and some were 8 1/4''
    Then you automatically got the good 10'' rear brakes.
     
  16. TrailBeast

    TrailBeast AKA Mopars4us on Youtube

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    Just covering the bases you know. :D
    I'm not questioning the manlyness of the one's I know are men.
     
  17. 6pk2goDemon

    6pk2goDemon Mopar Mod Staff Member FABO Gold Member

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    You shouldn't have to pull the drums to measure if they're 9 or 10. Max diameter #'s should be stamped on the outside....

    Good Idea !! :)
     
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