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74 CJ drum brakes 11 or 10"?

Discussion in 'Intermediate CJ-5/6/7/8' started by Kodiak12060, Jun 7, 2005.

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  1. Jun 8, 2005
    TheBeav1955

    TheBeav1955 Member

    Wyoming, Mi
    Joined:
    Apr 14, 2004
    Messages:
    296
    My 72 Had 11" drums all the way around but It is soooooo much better with the disc's I upgraded to the 11's would stop you but never straight no matter how much I adjusted them but now its straight hands off
     
    TheBeav1955, Jun 8, 2005
    #21
  2. Jun 9, 2005
    Kodiak12060

    Kodiak12060 Sponsor

    Beacon NY
    Joined:
    Sep 27, 2002
    Messages:
    465
    Ok here is what I found. The aftermarket 11" drum brake conversions use a finned or reinforced drum brake. The ring or fin precludes it's use w/ the 15X8 Renegade steel rims. So I'm going to see if I can buy some unreinforced drums and if that works I'll be selling some brand new 11" drums. I'll keep you posted.
     
    Kodiak12060, Jun 9, 2005
    #22
  3. Jun 10, 2005
    74CJ

    74CJ Jeepers Creepers

    Upstate NY
    Joined:
    Apr 20, 2005
    Messages:
    98
    Mine are 11's
    Stops great.
     
    74CJ, Jun 10, 2005
    #23
  4. Jun 10, 2005
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
    Joined:
    Aug 10, 2003
    Messages:
    23,596
    So... my '73 did not have finned drums. I thought my '75 did, but maybe not. Which years came with finned drums, if any?
     
    timgr, Jun 10, 2005
    #24
  5. Jun 10, 2005
    Kodiak12060

    Kodiak12060 Sponsor

    Beacon NY
    Joined:
    Sep 27, 2002
    Messages:
    465
    Ok ready for this.
    We took the 11" drum brake "kit" drum off my five. It is a solid drum and is thicker, and has a wider outside edge, than the ones on the 74 CJ6 and a 72 Commando. The ones on the 74 and 72 have concentric rings around them.The 11" kit would not allow a 15X8 rivited Rengade steel rim to fit nor the stock 62 15X5 rim. Now the 11" drums from the CJ6 and Commando fit over the pads of the kit and not only did the Renegade rim fit but so did the stock 15x5" 1962 rim!
    Now the next question. What were they thinking w/ a rivited 15X8 rim?
    Wouldn't that mean that it needs an inner tube, in the late 60's!
     
    Kodiak12060, Jun 10, 2005
    #25
  6. Jun 12, 2005
    tiptoptune

    tiptoptune New Member

    Joined:
    Nov 29, 2004
    Messages:
    33
    what are you guys meaning by drilled for better stoppinig power?
     
    tiptoptune, Jun 12, 2005
    #26
  7. Jun 13, 2005
    lynn

    lynn Time machine / Early CJ5 HR Rep Staff Member

    Huntingdon PA
    Joined:
    Sep 20, 2002
    Messages:
    3,437
    Drilling holes to "vent" the drums. Improves dry braking, greatly reduces or eliminates "fade" on a long downhill braking session. GREATLY improves wet braking!

    Do a forum search on "Drilled Drums"
    Here's one of the threads, with a pic of my project...

    http://www.earlycj5.com/forums/showthread.php?t=1202&page=1&highlight=Drilled+Drums
     
    lynn, Jun 13, 2005
    #27
  8. Mar 10, 2006
    newjeep75

    newjeep75 New Member

    Toronto
    Joined:
    Feb 7, 2006
    Messages:
    44
    So, are you saying that I should now try either the 74 CJ6 or the 72 Commando 11" Drums to get my 15X8 Riveted Kelsey Hayes to fit? Would these Drums fit onto my backplate? I have a '75 CJ5.


    10 mins later.....

    Actually I just looked up the Drums, here is what I found.

    From Raybestos:

    - 72 Commando 11" Drums, same part number as the ones I just tried tonight on my 15X8 Riveted Kelsey Hayes, and they will NOT clear the Rivets.

    - 74 CJ6 Drums, Drums are Finned, so I don't see how they would fit.

    My questions is, how come your Drums clear the Rivets and every Drum I try will not, by about 1/4"? I just don't get it.

    See link for some background:
    http://www.earlycj5.com/forums/showthread.php?t=26175


    Todd.
     
    newjeep75, Mar 10, 2006
    #28
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