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CJ2A know how needed

Discussion in 'Flat Fender Tech' started by REDCRO, Sep 20, 2005.

  1. Sep 20, 2005
    REDCRO

    REDCRO New Member

    poplar bluff...
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    Sep 20, 2005
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    I have a 1948 cj2a and I cannot get the dist to come out of the block.

    is there any trick to removing one from the L134 or is mine just weird.

    all help appreciated.

    also, will any other axles from the jeep line up bolt in and provide better breaking, and strength?
    can get 1979 cj5 parts jeep with d30 disc brakes.
     
  2. Sep 20, 2005
    lynn

    lynn Time machine / Early CJ5 HR Rep Staff Member

    Huntingdon PA
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    The D30 will practically bolt-in, but it will be about 3" wider overall. Not a bad thing.
    Ideally, you'd want to find a '70 - '71 CJ Flanged D44 rear with the offset diff to match your stock D18. Then upgrade the rear brakes to 11" drums.

    You will want to upgrade your master cylinder to run the discs/bigger drums.

    I'm not much help with the dist... did you try to turn the engine over slightly with a breaker bar on the crank pulley bolt to relieve any stress on the dist gear? It might help...
     
  3. Sep 20, 2005
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Go for the CJ5 for front axle and steering parts.

    You could upgrade all that as the PO of my Jeep did. He bought a '76 Jeep and swapped front axle, power brakes, and steering into the '71. The flattie wouldn't be that much different I wouldn't think.
     
  4. Sep 20, 2005
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    You don't have to swap axles to get better brakes. http://www.earlycj5.com/tech/brakes/11InchSwap/11_swap.shtml

    The Dana 30 axle from a '79 will probably have a 3.54:1 gear ratio - if so, you won't be happy if you keep your L134 and swap in the axle. You probably have a 5.38:1 ratio now. The stock axles should be strong enough with that engine, depending on your driving style.
     
  5. Sep 20, 2005
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    True, I forgot it was an L-head not a V6. :oops:
     
  6. Sep 20, 2005
    REDCRO

    REDCRO New Member

    poplar bluff...
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    are the springs on a 1979 cj5 and a 1948 cj2a the same distance? just how easy is this swap? I would like to use both axles if I could. I have a scoutII d20 transfer case will that swap inplace of the d18?

    so many questions so little time.

    The story:

    I found a 1948 cj2a that is practicaly rust free, the motor ran until the dist. rotor no longer turns with the oil pump. Point is I am new to the flattie thing and I want a good driver/trail rig built out of mine. (31-33" tires lockright rear and a whole lotta fun.)

    Thanks
     
  7. Sep 20, 2005
    lynn

    lynn Time machine / Early CJ5 HR Rep Staff Member

    Huntingdon PA
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    Good points Tim :)
     
  8. Sep 20, 2005
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    No, the springs are both longer and wider. The front axle spring pads are the same distance apart IIRC. You'd have to move the spring pads inward on the rear axle, since the '79 frame widens to the rear.
     
  9. Sep 20, 2005
    48cj2a

    48cj2a http://bantamt3c.com

    Central Illinois
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    For the Distributor try taking the oil pump off the other side of the block and see it is stuck there. When I put mine in I believe I just slid it right in and put the retainer and bolt on.

    I also did a disc brake coversion on my 2A using Chevy 4x4 front disc brake backing plates, and calipers. and then CJ7 rotors. Small write up on my web site, but its all bolt on with some minor grinding to clear the calipers.
     
  10. Sep 20, 2005
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
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    Here is a site with some good Jeep Tech. The different axles are listed on the left with some good measurements, ratios, and availability. Match what your doing with the overall drive train. IMO - if you stay with a V6 or smaller and 31's or smaller the stock axles will do what you want with some judicious use of the skinny pedal. If you want more roar and to get a little wild – well you can do any thing with the right $$$ and Time.

    You can start stock and upgrade as you break things or if you know what you want, spend the $$$ and time up front and put the Dana 44’s in from the get go.
     
  11. Sep 20, 2005
    REDCRO

    REDCRO New Member

    poplar bluff...
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    Sep 20, 2005
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    i want a rig I can drive on the highway to the trails, maybe to work if economy permits. I have an all out mud truck now, this is just for recreation without the need of a towrig and trailer.
    [​IMG]
    1945 CHEVY
    1948 CJ2A
     
  12. Sep 20, 2005
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    How about a Warn/Saturn overdrive? The offset of the Dana 18 makes a place for this cool little planetary transmission. You can more easily run at highway speeds then. http://www.hermtheoverdriveguy.com/id130.htm ... though we're talking 55-60, not 70-75.

    Realize though that the power-to-weight ratio of a 4-banger Jeep is marginal for cruising at highway speeds. Big tires too are going to make your frontal area larger, rolling friction higher, and gear ratio less favorable. And unlike modern engines, the Willys 4-bangers are all through at 4000 RPM. They have a really long stroke, which gives lots of torque but isn't a spinner. Push them too hard and the rod velocity gets really high, and your rod bearings are in peril.

    That said, I'd love to have a flattie with an L-head. They are a blast to drive, and remarkably competent on the trail in stock form (or so I've heard).
     
  13. Sep 21, 2005
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    If you have the clamps off the distributor is just stuck from maybe corrosion. Try spraying some type of penetrating oil and turning the whole distributor body to break it free. Might take a while. There's no gear on the distributor, just an offset tab where you can't put the distributor in wrong.
     
  14. Sep 21, 2005
    REDCRO

    REDCRO New Member

    poplar bluff...
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    thanks for the info on the tab, i think mine is broken since the dist. turns free of the motor. anyway the dist. housing will not turn but I will let you know how it turns out.

    If anyone has anywrite ups on saginaw swap, engine swaps or putting cj5 axles under please link it for me.
     
  15. Sep 21, 2005
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    http://www.novak-adapt.com/knowledge/engines_general.htm

    <edit> IMO the only engines that make sense for swaps in flatties are modern 4-cylinders and the Buick V6. V8s will fit, and were popular 20 years ago, but why struggle to fit them in now that the Buick V6 is so widely available?

    Look at the tech articles at earlycj5.com or the CJ3B page for axles, brakes and such.
     
  16. Sep 21, 2005
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
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    Redcro - Having done alot of these, I agree with Tim in that the V8 in a Flattie is just not worth the effort any longer. There is so much you can do with a V6 these days that the power to weight ratio and gearing can baffle the mind.

    FWIW - the '46 has 4.88's - '89 231 - Warn OD and with 31" tires ran 70mph with ease. I liked it so well I have another set of 4.88 axles I will be installing in another rig (hopefully this winter). Even with 5.38's in the Red '51 65 is no problem at all.
     
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