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frame differences

Discussion in 'Early CJ5 and CJ6 Tech' started by mb82, Nov 1, 2004.

  1. mb82

    mb82 I feel great!

    ok i know this has been covered before but i could not find it by searching.

    is there a difference between late CJ and early 5 frames. other then width and lenght.

    i saw that 4WDHardwear has heavy duty steering box mounts but of course they are for the late CJs. i looked at it and it looks to me to be 1/2 plate welded together and it just fits over and under the frame and bolts on with at least 4 good sized bolts. im not sure if i want to go that route since i could not set my steering box in the way i want to to keep it out of the rocks. but it is finished so there is more time saved there.
     
    mb82, Nov 1, 2004
    #1
  2. sparky

    sparky Sandgroper Staff Member Founder

    I'm not sure what the similarties are. ;)
     
    sparky, Nov 1, 2004
    #2
  3. mb82

    mb82 I feel great!

    i was just wondering like if the size was the same. like dont we use a 2in by 4in framerail, are they the same?
     
    mb82, Nov 1, 2004
    #3
  4. lynn

    lynn Time machine / Early CJ5 HR Rep Staff Member

    The framerails on my '71 are 2x3" open C-channel. Boxed only in the engine bay.
    I think AMC started fully boxed frames in '76. I don't know the dimensions of those.
     
    lynn, Nov 2, 2004
    #4
  5. mb82

    mb82 I feel great!

    ok well after looking at this thing closer AKA not while on the toliet i think i can make it. it will just take some time to build the thing.
     
    mb82, Nov 2, 2004
    #5
  6. lynn

    lynn Time machine / Early CJ5 HR Rep Staff Member

    I looked more closely at my frame last night. It's 2x3" from the frame horns to about the axle bend in the rear. From there, I think it stays 2" wide but the height changes. At one spot it looks to be around 5 to 6" tall, in the area just before the rear axle hump.
     
    lynn, Nov 3, 2004
    #6
  7. timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    I believe you are looking at the replacement bracket for the '76-82 CJs? After '75, Jeep used a stamped steel bracket that bolted to the frame. From '72-75, they used a cast bracket, again bolting to the frame. Both of these designs depend a lot on the big, flat front crossmember in front of the radiator for rigidity.
     
    timgr, Nov 3, 2004
    #7