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1967 Cj-5 F134 Brake Drum Size?

Discussion in 'Early CJ5 and CJ6 Tech' started by Dan Lockwood, Nov 13, 2021.

  1. Nov 13, 2021
    Dan Lockwood

    Dan Lockwood New Member

    Mid-Michigan
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    Sep 19, 2021
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    Sorry about what might seem to be a "too basic for the forum" question, but I do NOT have my Jeep home and just researching some items for the "to do" list after our new house is completed and my workshop is furnished with a new 2-post hoist/lift... :)

    I see that MOST early CJ's have the 9" drums and some of the later have 11" drums. But I've been reading and it appears that "some" CJ's come with 10" drum and my year seems to conform to possibly having 10" drums. Were they for the V-6 only CJ's and the F134's were stuck with the 9" drums?

    Is there anyway short of crawling under it, which I can't do at this time, to find out what drums might be factory on my Jeep?

    Thanks in advance!

    Dan
     
  2. Nov 13, 2021
    Oldpappy

    Oldpappy A.C. Fults - Curmudgeon at large 2021 Sponsor

    East Tennessee
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    A 1967 standard CJ5 (with the F-134) would have 9" Bendix brakes which have two eccentrics for adjustments. These are a big improvement over the 9" Lockheed brakes with 4 eccentrics as used on earlier Jeeps such as the CJ2A.

    Do not start ordering parts until you DO have your Jeep home, because with a vehicle more than a half century old all sorts of things could have been replaced with newer, or older parts.

    I just converted my 67 CJ5 to 11" drum brakes, so if you need original parts I have the drums and backing plates from my Jeep and you can have them for the cost of the postage.
     
  3. Nov 13, 2021
    Dan Lockwood

    Dan Lockwood New Member

    Mid-Michigan
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    Sep 19, 2021
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    Thanks for the information. I have purchased a reprint of the the '66/'68 Jeep service manual. It just says that there's a front and rear cam in each backing plate for the eccentric type and "if supplied" with the 11" they will have the self adjusters. It lists 10" drum/shoe and 9" drum/shoe AND the 11" system. So was it hit and miss on which went with what? I would guess the 11" were with the V-6, but again, only a guess.

    It is very interesting seeing all the OLD stuff. I was a Chevy/Pontiac service manager in mid MI for around 14 years from the 70's up and even then these Jeeps were archaic in design. Looking forward to learning as much as I can, thanks again for the help and advice!

    Dan
     
  4. Nov 13, 2021
    dnb5853

    dnb5853 Member 2021 Sponsor

    Grand Mesa, CO
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    I learned quickly that some FLAPS don't have the 10" brake parts listed correctly for the V6 models.
     
  5. Nov 13, 2021
    mickeykelley

    mickeykelley Well-Known Member

    Republic of Texas
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    Oct 10, 2015
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    1,770
    The big thing to remember is exactly what he said. These things have been changed by various owners so always check before you commit to anything. For example, my ‘58 came with 9” front and rear. I put 11” Bendix on the rear and did the Geo disc on the front and changed the out the single MC for a dual. These changes are very common so always best to verify first.
     
    dnb5853 likes this.
  6. Nov 13, 2021
    Dan Lockwood

    Dan Lockwood New Member

    Mid-Michigan
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    I happen to own a '92 4WD Geo Tracker that I will more than likely strip down and junk out. I know that the Suzuki Samurai and the Geo Tracker also use a 5 on 5.5" hole pattern and is that how the disc brakes match up? I've not seen any YouTube or other mention of Geo Tracker disc brakes on an early CJ-5. What type of job is it? Not that hard is a problem, but just wondering.

    Thanks for the new thought... :)
     
  7. Nov 13, 2021
    Oldpappy

    Oldpappy A.C. Fults - Curmudgeon at large 2021 Sponsor

    East Tennessee
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    Dan,

    There is a lengthy discussion on using the Geo Tracker disc brakes on a Jeep on the CJ2A Page forum. What will work for a CJ2A will work for a CJ5. If you go there and search for disc brake conversion you should be able to spot it.

    I understand the confusion from looking at the manual, there were some options available, but again a 1967 "standard" CJ5 would have had the F134 engine and would have came new with 9" Bendix brakes.

    The Dauntless Jeeps with the V6 had larger brakes in 67, possibly 10" rear and 11" front, but I am not certain of that.

    The Jeepsters or Comandos had larger brakes too.

    The 10" brakes used on Jeeps were a Wagoner design and some of the parts, especially the adjusters, are very difficult to find.

    With all the differences out there I have seen all kinds of mis-matched stuff on old Jeeps due to parts getting swapped. Let us know what you find once you get your Jeep home.
     
  8. Nov 13, 2021
    Dan Lockwood

    Dan Lockwood New Member

    Mid-Michigan
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    Thanks, I'll take a trip to the other forum tomorrow and see what I find.
     
  9. Nov 13, 2021
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member 2021 Sponsor 2020 Sponsor

    Denver, CO
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    I don't believe any early (up through 1971) cj's came with 11" brakes. The 4cyl all had 9" and the v6 had 10" self-adjusting. 11" manual adjusted (sometimes referred to as wagner?) brakes were very common on things like Willys wagons and trucks, but not on cjs. In 1972, 11" self-adjusting (Bendix style?) came around on cj's....Lots of options for modifications if you are not interested or don't have the OEM 9" brakes - most members here don't recommend keeping the 9" unless going for a very stock style restoration.

    The 10" v6 brakes do work reasonably well, and the self adjusting feature is nice, but parts are getting scarce and pricey. The 11" self adjusters work very well, and parts can still be had at NAPA and the like (you'll need to source some backing plates, but they are bolt on). Many members have made the move to disc brakes, as the cost isn't much different than upgrading to 11" drums if you source your own pieces (as compared to buying a complete put together kit from one of the standard suppliers).

    As mentioned above, if you don't know what brakes you currently have on the jeep, I'd hold off buying parts until you know for sure, as brakes often get changed upgraded (owners have been swapping out those 9" brakes for almost as long as jeeps have been around).

    If you are interested in disc brakes...this is a good thread with detailed part info:
    Front Disc Brake Tutorial
     
  10. Nov 14, 2021
    mickeykelley

    mickeykelley Well-Known Member

    Republic of Texas
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  11. Nov 14, 2021
    amboynut

    amboynut Member

    Chelatchie, WA
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    Wagner or Wagoneer?
     
  12. Nov 14, 2021
    Oldpappy

    Oldpappy A.C. Fults - Curmudgeon at large 2021 Sponsor

    East Tennessee
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    Wagner, I made a typo. It happens.
     
  13. Nov 14, 2021
    matt johnson

    matt johnson Caretaker of family Jeeps 2021 Sponsor 2020 Sponsor

    chesapeake, va
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    My '67 has 10"
     
  14. Nov 14, 2021
    Keys5a

    Keys5a Sponsor

    Florida Keys
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    My '66 has 10" brakes, front and rear, as does my '64 CJ5a. I think the 9" drums were phased out around '63 or '64.
    -Donny
     
  15. Nov 14, 2021
    Oldpappy

    Oldpappy A.C. Fults - Curmudgeon at large 2021 Sponsor

    East Tennessee
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    Nope, both of the 67 CJ5s I have still had them, and I know for a fact that one of them was an unmolested standard CJ5. I think only the V6 Jeeps had the larger brakes.
     
  16. Nov 15, 2021
    amboynut

    amboynut Member

    Chelatchie, WA
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    Thx
     
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