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Early CJ5 Brake Conversion... which one??

Discussion in 'Early CJ5 and CJ6 Tech' started by USMC_LB, Sep 8, 2009.

  1. Sep 8, 2009
    USMC_LB

    USMC_LB Member

    Tipton Co, TN
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    Jul 3, 2009
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    I am in the process of deciding which direction to go in regards to a brake conversion on my '67 CJ6. Once the teardown is done and the axles have been gone through, brakes will be next in line.

    I have narrowed it down to 11" drums all around -or- Disc Brake front & 11" Drum rear. I know there are a few different routes to go.

    Please state what setup you personally have, then your comments.

    Is one more superior than the other in overall stopping power?

    Which setup would be better for wheeling ?

    Which setup would be better for street?

    Would one be "easier" to service compared to the other ?

    Thanks, TimD
     
  2. Sep 8, 2009
    Mcruff

    Mcruff Earlycj5 Machinist

    Albertville, AL
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    Sep 22, 2002
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    5,349
    I have disk brakes up front with a dana 30 and 10" self adjusting in the rear. I use the stock 71 dual MC to run this setup. They stop great and will keep the jeep nice and straight while doing so.
     
  3. Sep 8, 2009
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    Well, if cost and effort is no object, disk brakes are superior. They are much easier to service and do not fade like drum brakes. They are also self-wiping, and thus work much better in wet conditions. They also last longer between services. The only negative feature (other than initial cost and effort) is that they have a higher unsprung weight than drums.

    Drilled drums are said to fade less than conventional drums.

    11" drums are pretty good though, being both easy to install and inexpensive.
     
  4. Sep 8, 2009
    USMC_LB

    USMC_LB Member

    Tipton Co, TN
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    Jul 3, 2009
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    You guys think there is a huge difference between (disc-front / 11"rear) and (4 wheel disc) ?

    TD
     
  5. Sep 8, 2009
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
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    Not sure - I ran the 11s all around for many years, now have Disc up front. I went the disc route as it was that or drill the drums for the wet. I didn't have a wet issue on the other drums I drove (no lip on the drum so they drained quick), but the new ones did.

    Dry - I don't know how much harder you can plant your nose in the windshield... either is a great opion.
     
  6. Sep 8, 2009
    USMC_LB

    USMC_LB Member

    Tipton Co, TN
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    Wait, wait, wait!
    You guys are supposed to be making this eeaaassier!!! :drool:

    I am leaning toward disc-front & 11" drum rear...

    Come-on guys give me some more imput!!R)

    TD
     
  7. Sep 8, 2009
    jasonjp62

    jasonjp62 Member

    Pennsboro WV.
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    Aug 15, 2009
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    799
    11" Drums are a very simple upgrade and fairly cheap to do. I run them on mine and it stops great. I can lock up the 33" tires pretty easy. Disk do work better if you are going to be in wet or muddy conditions. And will require less maintance than drums. I say it depends on how much cash you want to spend!
     
  8. Sep 8, 2009
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
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    Jul 30, 2003
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    11" drums on all four
    works for me
    and I had discs....
     
  9. Sep 9, 2009
    winch

    winch New Member

    b.c. canada
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    Dec 9, 2005
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    isnt there a prob on the rims you can use withdisc?
     
  10. Sep 9, 2009
    66cj5

    66cj5 Jeep with no name

    NorthWest Indiana
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    i run the 11" drums f/r. easier to get parts for since early/mid '70's ford trucks used the same brakes.
     
  11. Sep 9, 2009
    USMC_LB

    USMC_LB Member

    Tipton Co, TN
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    Was planning on running larger steel wheels after conversion.

    TD
     
  12. Sep 9, 2009
    windyhill

    windyhill Sponsor

    PA
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    I have 11" drums on my 3b and there great unless they get wet and muddy then they become almost useless. (only happen one time, thank goodness for T-18 and 5:38's on the down hills) 90% of the time, I love them. haven't tried the drilling trick yet as I have the finned drums. I'm trying the disc dana 30 conversion on my next project.
     
  13. Sep 9, 2009
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
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    If you have the time and inclination – do the disc up front, you can not go wrong with it.
     
  14. Sep 9, 2009
    jzeber

    jzeber Well-Known Member 2022 Sponsor

    Morgan Hill, Ca
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    I run disc up front and 10" rears with stock MC. I prefer the discs for wet conditions and dirt not getting trapped in the drums. I am considering discs in the rear as well.
     
  15. Sep 9, 2009
    Daryl

    Daryl Sponsor

    Bonney Lake, WA
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    Disks up front if you are gonna drive it wet and muddy. IMO Disks in the back don't really bring anything to the party. It seams as if about 85% of the braking is done by the front. That being said, I just put 86 cherokee pedal, booster, m/c on my 71 with Dana 30 running 11" brakes and it puts ya through the windshield. I am still gonna swap the disks up front when I get the time, but I never seem to get to work on any of my jeeps.
     
  16. Sep 9, 2009
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
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    I ran the stock 9" for years. Not so good. Went 11", worked great until wet. Went disc first in the front then both ends. Will not willingly go back to drums on a wheeling Jeep. As was said, better water/mud dissipation with discs. Also much less maintenance.
     
  17. Sep 9, 2009
    w3srl

    w3srl All-around swell dude Staff Member

    Port Orange, FL
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    Stock early Jeep rims will not clear the GM disc conversion, you either need to use OEM wheels from a '77 or later CJ or else go with an aftermarket wheel.

    Don't ask me how I learned this one. :mad:
     
  18. Sep 9, 2009
    alex211

    alex211 Member

    Pennsylvania
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    Aug 25, 2009
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    Does anybody have a link to an article or something on the 11" drum brake conversion?
     
  19. Sep 9, 2009
    davistroy

    davistroy Grasshopper

    Marietta, GA
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  20. Sep 9, 2009
    jasonjp62

    jasonjp62 Member

    Pennsboro WV.
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    I got my parts from a 76 postal jeep, Parts bolted right on. even the hoses in the front was the same size.
     
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