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Axles for running 46's?

Discussion in 'Jeep CJ' started by T-TRAIN, Jul 6, 2020.

  1. Jul 6, 2020 at 6:49 PM
    #1
    T-TRAIN

    T-TRAIN [OP] New Member

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    THOMAS
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    LIFT
    I am getting ready to start my build and am getting mixed reviews, I have a 1985 CJ7 and want to run 46 Mickey Thompson Baja Claws. I am building this jeep to just cruise around 45 mph around 25 miles from ocean springs to Bay st louis, MS. I have stock axles and I know they will have to be beefed up or changed but what is your recommendation for axles? I also have the straight 6 and currently running 35's just fine. I am just searching for information and opinions.
     
  2. Jul 6, 2020 at 9:34 PM
    #2
    Jim Beam

    Jim Beam Well-Known Member

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    Technically the Jeep CJ is not designed for anything over the size of tire that it came with. I am sure you have noticed a reduced braking capability, reduced power, inaccurate speedometer, automatic transmission overheating or excessive wear on a manual transmission clutch, and tire clearance issues. All of these issues can be solved correctly with enough money spent that you will never get back.
     
    aggrex likes this.
  3. Jul 7, 2020 at 1:57 PM
    #3
    Prerunner1982

    Prerunner1982 Well-Known Member

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    Beefed up 1 tons and a V8, or Rockwell 2.5 tons with 6.72 gear ratio for the I-6.
     
    LYFZGOOD and aggrex like this.
  4. Jul 7, 2020 at 3:31 PM
    #4
    aggrex

    aggrex Well-Known Member

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    DE
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    Tuffy>AEV>TTO>JW>STech>EVOcage>MagnaFlow>SpiderTrax>RockHard>TF>SpringTail>67design>Bolt>GPCA>Curt>
    Those parts will place you in the ultimate rock crawler club :jeep2:
     
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  5. Jul 7, 2020 at 5:37 PM
    #5
    Jim Beam

    Jim Beam Well-Known Member

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    My CJ has a 103 to 1 first gear ratio and I go real easy on the pedal when in that gear. I had an aircraft stress engineer calculate what diameter axles I would need to handle that kind of torque. It was calculated to require a 2" diameter.
     
  6. Jul 21, 2020 at 5:08 AM
    #6
    Eyy-sp12

    Eyy-sp12 Active Member

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    T-176 Transmission with Dana 300
    I bought a rear differential how can I tell fotcsurexif it is a Dana 44 ? It has some tags on it . However I dont see anything saying D44? Appreciate any help.
     
  7. Jul 21, 2020 at 7:57 AM
    #7
    Prerunner1982

    Prerunner1982 Well-Known Member

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    post a picture of the differential cover.
     
  8. Jul 21, 2020 at 7:31 PM
    #8
    Jim Beam

    Jim Beam Well-Known Member

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    A Dana 44 has a 12 bolt rear cover.
     
  9. Jul 22, 2020 at 6:18 AM
    #9
    Eyy-sp12

    Eyy-sp12 Active Member

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    T-176 Transmission with Dana 300
    All no matter what have 12 bolts in cover . I thought it would have D44 wrote on it . Anyway thanks
     
  10. Jul 22, 2020 at 12:25 PM
    #10
    Jim Beam

    Jim Beam Well-Known Member

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    You can also check the rear cover shape online to confirm.
     
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