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Thread: Master Cylinder

  1. #1
    Junior Member
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    Master Cylinder

    I'm George and I'm rebuilding a 1946 Cj2a from the frame up. Right now a brake system question. I have 11" drum brakes. Do I need a dual master cylinder? Thanks to anyone who can weigh in.

  2. #2
    Super Moderator LarrBeard's Avatar
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    'Mornin' George;

    I'm not an expert, or any kind of spurt, on the little Jeeps, but as I looked at what comes in the 11" upgrade kits, they include larger wheel cylinders for the fronts, but none of them I saw changed the original master cylinder to a dual master cylinder. A one-holer seems good-to-go.

    But - others may have different opinions...

  3. #3
    A duel master is safer as it splits the system to two separate systems, thus having a backup in case of a failure. as long as your single has enough volume of fluid in the piston you should be ok.

  4. #4
    New member: will the duel Master Cylinder fit with the other item for disk brake conversion at the same location on CJ2?

  5. #5
    Senior Member 5JeepsAz's Avatar
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    beware those one holes. thats all you got. they did work for decades though. the dual ones are large though so the fitment question is a good one. I'd wonder about the final solution: is your final solution a resto mod for driving! or historical accuracy.?

  6. #6
    Super Moderator bmorgil's Avatar
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    Quote Originally Posted by Rick Simpson View Post
    New member: will the duel Master Cylinder fit with the other item for disk brake conversion at the same location on CJ2?
    Rick, I am not sure of your question but, I think this may help. When converting to the dual master cylinder use the kit. https://www.kaiserwillys.com/dual-re...its-41-71-jeep Included are the brackets and parts needed to make the dual master cylinder bolt into the original location.

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