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Jk "build"

Discussion in 'Quitters' Club' started by 73 cj5, Oct 25, 2021.

  1. Oct 25, 2021
    73 cj5

    73 cj5 Not ready for the junkyard yet 2020 Sponsor

    Biloxi, Mississippi
    Joined:
    Jan 10, 2014
    Messages:
    1,800
    This will be a very slow process of me buying parts and then installing them at one time for the most part. What I have is an 07 JK Rubicon with just a 3" lift and ugly bumpers. It just hit 240k a few days ago and that means it's plenty broken in. I will continue to drive it daily until things are ready to be swapped in. There's a purpose to this build but it'll be obvious eventually, as long as I don't change my mind.

    So axles were the first thing I had set out to find. Most people like the 05+ super duty axles because they are just plain ol' beef. I stole this info but here it is.

    05+ Ford Super Duty D60 Axle Specs:
    -Tubes: 3.75" OD, 1/2" wall
    -WMS to WMS: 72"
    -Ring Gear: 9.75" (a 10" can be sourced from Ford in limited ratios)
    -Lug Pattern: 8x170
    -Wheel Studs: M14x1.50
    -Axle shafts: 35 spline
    -U-joints: 1480
    -Tone ring: 60 tooth

    I couldn't find one for a reasonable price with 4.10s (what I have now) so I found a '90 kingpin Ford Dana 60 with 4.10s.

    What I know about the KP D60 axle I sourced.

    Tubes: dia. 3.125", wall thickness 0.5"
    Ring gear: 9 3/4
    Axle shafts: 35 inner/30 outer*
    Lug pattern: 8x6.5
    UJoint: 1480
    WMS-WMS: 69.25"

    I hear about the knuckles being weak on the Ford versions but they can be gusseted or replaced. *You can swap the 30 spline outer for a 35 spline flavor stub shaft. I'll have to replace or modify the DRW hubs.

    [​IMG]

    As far as the rear axle goes I'll probably snatch up whatever I find cheapest which will either be a 14 bolt or sterling 10.25/10.50.
     
    ITLKSEZ likes this.
  2. Oct 25, 2021
    Fireball

    Fireball Well-Known Member 2021 Sponsor 2020 Sponsor

    Pullman, WA
    Joined:
    Feb 9, 2018
    Messages:
    3,090
    Sounds like you're going to copy ITLKSEZ's 3b again, but post rebuild and with a JK.
     
  3. Oct 25, 2021
    RATTYFLATTY

    RATTYFLATTY I think you need a little more throttle

    Central MN
    Joined:
    Oct 23, 2007
    Messages:
    469
    The weak knuckle thing is relevant to tire size, weight and what the steering system is. Yes they can be gusseted, plated or upgraded. Just a question, what size rubber are you going to run? 4.10's seem kinda tall when a 60 is needed for the beef or will that change? I ask as I'm running 4.56's in my 14 JK with 35's. I'm planning to upgrade the front to some version of a 44 as not needing larger than 35's on a 2dr.
     
  4. Oct 25, 2021
    boopiejones

    boopiejones I can’t drive 55

    California east bay
    Joined:
    Mar 16, 2020
    Messages:
    348
    I have a 2013 Jk on 37’s with 4.56 gears (I originally had 35’s, so the 4.56 was just right).

    The 37/4.56 combo is great on the road, but 5.13 would be much better for off-road. 4.88 is probably the sweet spot for a JK on 37’s IMO.

    I assume you’re going with a tall tire, given the beefy axle choice. Between that and the 3.8l motor in your 2007, I’d seriously consider lower gearing than 4.10.
     
    RATTYFLATTY likes this.
  5. Oct 25, 2021
    Buildflycrash

    Buildflycrash Blind and Dirty 2020 Sponsor

    Gulf Breeze FL...
    Joined:
    Jun 5, 2007
    Messages:
    2,433
    There was a 4WD ford truck w/ no engine for sale here a couple months back. I think they wanted $750 for the whole thing. I really wanted to buy it but don't have room to store more axles no less a whole truck.
     
  6. Oct 25, 2021
    73 cj5

    73 cj5 Not ready for the junkyard yet 2020 Sponsor

    Biloxi, Mississippi
    Joined:
    Jan 10, 2014
    Messages:
    1,800
    Currently have 35s and 4.10s and it works good on and off road. The 4:1 transfer case gears really help off road. I'll be limited to a 35" or 37" tire depending how things go. No doubt regearing is in the future and I'll install lockers also.

    You make it sound like a bad thing. :lol:
    They'll be two completely different machines. One will be more like a tractor in Jeep's clothing and the other, well...
     
  7. Oct 25, 2021
    Fireball

    Fireball Well-Known Member 2021 Sponsor 2020 Sponsor

    Pullman, WA
    Joined:
    Feb 9, 2018
    Messages:
    3,090
    No, It's very good thing!
     
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