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Rear Disc Brake Conversion

Discussion in 'Intermediate CJ-5 and CJ-6 Tech' started by Ron, Dec 9, 2003.

  1. Dec 9, 2003
    Ron

    Ron New Member

    Jakarta Indonesia
    Joined:
    Dec 9, 2003
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    2
    Hi, I just found this forum.

    I owned a 1976 CJ-5, which I believed to be 1975 made originally. Has anybody ever do a rear brake conversion to discbrakes? Of course with the emergency brake system as well.

    Appreciate all information shared.

    Regards,
    Ron
     
  2. Dec 9, 2003
    sparky

    sparky Hoon Staff Member Founder

    Toowoomba, QLD
    Joined:
    Sep 20, 2002
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    9,055
    Ron,
    Welcome from snowy Nebraska this morning!

    Chuck P. who's on this forum as Oldjeep has this on his website. Perhaps it will help.

    http://www.oldjeep.com/disc.htm
     
  3. Dec 9, 2003
    Ron

    Ron New Member

    Jakarta Indonesia
    Joined:
    Dec 9, 2003
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    2
    Really appreciate your advise spark. I've surfed to the site you suggested and it explains conversion for Dana 41 Rear and Dana 21 Front. My CJ5 uses Dana 44 Front and Rear. I've convert the front using CJ7 stock disc brakes. For the rear conversion actually I can use the same stock materials from CJ7, however, the trouble is on the emergency brake system. I need the emergency brake mainly to handle steep downhills.

    I currently also doing a restoration project on my CJ3A. I will keep the project posted.

    Maybe you have another bright idea?
     
  4. Dec 10, 2003
    sparky

    sparky Hoon Staff Member Founder

    Toowoomba, QLD
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    9,055
    Dana 41 isn't that different from a 44 I didn't think.

    I'd write Chuck an e-mail and ask him if it were me.
     
  5. Dec 21, 2003
    w3srl

    w3srl Jeepless in Pittsburgh Staff Member Sponsor

    Pittsburgh, PA
    Joined:
    Nov 6, 2002
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    3,955
    I'm headed that way with my '48 in the spring. The same mounting brackets used to convert a Dana 25/27/44 to front disks will bolt up on a rear 41/44.

    If you want to have rear emergency brakes also, instead of Chevy truck calipers you would use Cadillac Eldorado rear calipers. These have the mechanical setup for the e-brake.
     
  6. Jan 20, 2005
    4x4chevette

    4x4chevette Member

    Lancaster, Ohio
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    Dec 19, 2004
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    So img getting ready to do this, can I sue the jeep rotor on the rear?
     
  7. Jan 21, 2005
    w3srl

    w3srl Jeepless in Pittsburgh Staff Member Sponsor

    Pittsburgh, PA
    Joined:
    Nov 6, 2002
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    3,955
    That is my understanding, but I haven't tried it yet. Supposedly the Chebby truck and Caddy Eldorado calipers interchange....
     
  8. Jan 21, 2005
    4x4chevette

    4x4chevette Member

    Lancaster, Ohio
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    Dec 19, 2004
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    133
    WOW!!!!!!!!!! $50 for new jeep calipers.... time to get the ole rotor turner out again, and go to the junkyard!!!

    Im startign to wonder if I cant sue the same stuff we use on 9inches in the racecar.

    Basicly, we get a chevy 5 on 5 11 inch rotor ( from monte carlo etc..)
    and redrill the hub, then we use monter calipers, with afco gm caliper mounts which weld direct to the axle tube.

    In my case, id need a 11 inch rotor from a 5 on 5.5 vehicle, say a newer 1/2ton ford truck... or, the jeep caliper... put on the wildwood racing calipers we have, and the afco weld on brackets, do the same up front, if I could find away to mount it where nothing interfers, as the knuckle turns.
     
  9. Jan 25, 2005
    fourtrail

    fourtrail Built not Bought

    Carlinville,...
    Joined:
    Jan 24, 2004
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    184
    Speedway motors also sells metric gm calipers with the e-brake setup for around $100 each.
     
  10. Jul 31, 2018
    badbsa

    badbsa New Member

    Fayetteville and...
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    Jul 12, 2018
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    I know my jeep isn’t an ECJ, but I would appreciate some assistance...

    I have a 71 DJ-5B with an Offset, flanged axle Dana 44 and uneven spacing on the backing plate bolts. Can anyone tell me if, aside from redrilling the holes to accomodate the uneven spacing, this will work on my axle? I’ve looked at aftermarket bolt-on kits and the prices are prohibitive and seem to result in less available replacement options than the chevy conversion.
     
  11. Aug 1, 2018
    nickmil

    nickmil In mothballs. Sponsor

    Happy Valley, OR
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    11,377
    Check with Richard at R&P Customs at 503-557-8911. He may still have some brackets and rotors left. As I recall those were the only proprietary parts they used in the old R&P 4 WD Parts Kits. The rest were off the shelf parts. I think they used Camaro/Firebird rear calipers. Maybe the later model thin rotor Cadillac calipers.
    The Cadillac Eldorado Calipers that fit the thick rotors were only something like a two year production, are no longer in production, and if you can find them expensive as hell.
    Regardless which park brake calipers you use you HAVE to have a working park brake linkage that is adjustable. It the lever on the caliper is not adjusted correctly the park brake will NOT work correctly. This is why so many people complain about these systems being ineffective. Because THEY don't set them up correctly.
     
  12. Aug 1, 2018
    IrishCJ6

    IrishCJ6 Member

    Wicklow Ireland
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    Dec 6, 2010
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    402
    On my CJ6 D44 I used the Suzuki rotor and Nissan caliper setup, brackets were made up to suit and welded to axle. Brakes work great but the park brake is rubbish as there is too much friction on the cables (old and tired) and the cables from the splitter to the caliper are too long resulting in a weak pull action being achieved. Also as it's a park brake (foot operated) it's useless off road so I will at some point remove and install an actual hand brake and modify the cables as required at that point.
     
  13. Aug 1, 2018
    badbsa

    badbsa New Member

    Fayetteville and...
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    Jul 12, 2018
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    2
    Thanks for your input. I’ll try him tonight. As far as the parking brake is concerned, I don’t want or need a mechanical e-brake if i run a hydraulic lock on the rear line.
     
    Last edited: Aug 1, 2018

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