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Thread: U-Joint expirement

  1. #1
    Wheeler
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    Nick

    U-Joint expirement

    As any of you who wheel a Dana 30 or 44 on bigger than 35ís probably know, the 1310 series steering u-joint in your axle has it limitations. If your running a quality Spicer 760x joint, the first thing that usually happens is the cap spins in the yoke, walks the half circle c-clip off, and your cap starts coming out until it hits a ball joint stud and self destructs.
    That situation can be remedied by either clearancing your shafts to run full circle clips, or by welding your caps to the axle shaft. Iíve been doing that for a few years, and it will get you a long ways, but I was still pretty good at breaking them even with the caps welded in.
    Once itís impossible for the cap to come off, the next weak point is the needle rollers in the joint, under extreme load they quit rolling and start to fail, and once all your needle rollers are turned to dust the joint self destructs pretty quick after that.
    Nowadays there are plenty of aftermarket solutions, CTM, OX, Nitro Gear, Longfield, and RCV to name a few, all of which are far out of my price range
    Most of the aftermarket ďsuperĒ joints run a bronze bushing instead of needle rollers, so thatís the direction I went.
    I was able to find some oilite bushings with the right ID and OD to replace the needle rollers in a Spicer 760x



    Gutted all the rollers out of the caps



    I had an old joint I had previously robbed all the seals from, and I noticed you could get 0.1Ē more bronze in the cap without the seals, so Iím trying one sealed joint and one without seals



    Installed in some junkyard shafts with caps welded in for good measure



    Next week is Bronco Safari, so we will see how they hold up. Normally I get 2 days out of a stock 760x with welded caps, hopefully with bronze bushing it does a little better

  2. The Following 3 Users Like 3rd Petal's Post:

    CashMoney (April 23rd, 2018), Dennis (April 23rd, 2018), Teal-J (April 22nd, 2018)

  3. #2
    Wheeler
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    Jay
    Interesting experiment. Awaiting the results, especially longevity reports of road driving

  4. #3
    Web Wheeler
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    Aaron

    U-Joint expirement

    What are you running to only get 3 days out of a quality 760? When I was running a built D30 I used the Longfields with great success, enough to easily be cheaper than the amount of 760s youíre going through. I like your idea, but Iím guessing it wonít be any stronger. The caps on the joints you mentioned are a bushing to allow the cross itself to be larger. All this might do is help prevent the distortion of the needle bearings, but Iíd wonder about the suitability of this material in that application.

  5. #4
    Wheeler
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    I’m running a fullsize bronco on 37’s. I’ve got 5 more days of trails here in Moab, we will see what happens, so far so good though
    Last edited by 3rd Petal; April 30th, 2018 at 08:48 PM.

  6. #5
    Wheeler
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    Held together for Moab, I’ll keep beating on them to see if I can break them. But so far they are doing pretty good

  7. #6
    Web Wheeler
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    Wonder how this worked out?

    Didn't CTM or one of those other companies come out with a special Copper based grease for their joints that worked better than regular?
    Some people are as useful as a football bat.

  8. #7
    Wheeler
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    They worked, I twisted off a stock shaft at the splines and never had a u-joint issue. I’d like to try them in some chromoly shafts, just haven’t gotten around to it. For grease I just ran a high graphite grease, I don’t know anything about copper based grease, I’ll look into it though

  9. #8
    Web Wheeler
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    Brizz
    Thanks for posting this, and thanks to WILLD420 for bumping it back up where I would see it. I remember reading it before, but forgot about it. It sounds like this is a vast improvement over just a stock Spicer joint.

    Can you post your source, part numbers and specs for the bushings you replaced the needle bearings with?
    Brizz

    Be careful infringing on peoples 2nd amendment rights with your 1st amendment rights, because you probably wouldn't like it the other way around.

    FJ-40 on 37's, locked/posi. Stock Grand Cherokee.

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  10. #9
    Wheeler
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    So the ones I used I got from work, don't remember the part number, but these should be the same or similar

    https://www.bronzebushings.com/aa-92...6-od-x-3-4-oal

    You need to shorten them to fit in the cap properly, I forget the length but it is easy to figure out with a little measuring. I haven't noticed a difference yet with the sealed vs non sealed ones I made, I'm guessing if you stay out the the mud like me the seals don't really matter much, but time will tell I guess

  11. #10
    Wheeler
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    It was 0.46 with seals, or 0.56 without

  12. #11
    Wheeler
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    Quote Originally Posted by WILLD420 View Post
    Wonder how this worked out?

    Didn't CTM or one of those other companies come out with a special Copper based grease for their joints that worked better than regular?
    Yukon's Super Joints use a copper based lubricant that is really similar to a copper based anti-seize. I've got a set of these joints in a Currie F9/Reid Kingpin 60 setup and they've been in place for a little over four years. I give them a squirt on every cap about once or twice a year and then always try to remember to unlock the hubs for the street.

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