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Thread: CV Weak Link

  1. #1
    Lifetime Member Getting Dirty TrialByFire's Avatar
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    CV Weak Link

    I broke my third drivers-side CV today (well actually, this time it was my wife).


    First, so that no one thinks this is going to happen during moderate off-roading, a couple of photos of where it happened.




    Here are some thoughts and recommendations.

    1. All three times I was able to get a trail-fix and drive out back to civilization. (We drove home 80 miles in 4-LO today.)

    2. Use a pry bar and put the CV back in place as well as possible, then block, shim, or whatever you can think of to keep the shaft centered between the strut legs. Avoid even moderate flexing and things should stay in place for the drive out.

    3. Anything steep and you will be hosed as all torque will go to the front. Try backing up the hills.

    4. With 33's and a SuperLift, you will need to take things very slow to avoid breaking! Avoid getting the front wheels in a bind and trying to climb out. Back up and re-approach. Under no circumstances get the front wheels spinning. Once your front wheels are up on top, you can bump it a little to get the rear over and you should be ok.

    5. We need chrome-moly CVs!!! Are you hearing this JBA? Armadillo? Even a hardened housing would be of help as all three times I broke, it was the housing that split--not the shaft.

    6. Carry spares (on the QDII, the left and right are different). It will not be a trail fix, but at least you can have a local shop swap the new one in in an hour or less.
    '06 XK Limited, 5.7 Hemi, QDII, OME struts & HD springs, JBA UCAs, 285/70R17 BFG KM2, 4XGuard Sliders, 4XGuard Diff Guard, Fox 2.0 reservoir shocks, custom bumpers and Warn xi9000
    Wish list: SFA, in-dash Windows 8 PC
    http://www.fuelly.com/driver/Blade/commander

  2. #2
    Lifetime Member Getting Dirty Matt's Avatar
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    wow man i've never seen someone break CV's as much as you.... what brand have you been replacing them with?

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    Lifetime Member Getting Dirty TrialByFire's Avatar
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    Quote Originally Posted by Matt View Post
    wow man i've never seen someone break CV's as much as you.... what brand have you been replacing them with?
    I'm replacing them with the NAPA reman brand.

    They are really weak! It's not like I'm just hammering...I am actually taking things pretty easy. My wife did get a little anxious today when it popped, but nothing that should have done the damage it did.

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    Senior Member Getting Dirty Omelet's Avatar
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    Wow! How much have the NAPA ones been costing you? Do you happen to have a PN for both sides?
    [05 WK Khaki 4x4 5.7L QDII ][ 5" SL (OME HD coils and struts) ][ 295/70/17 Nitto Trail Grapplers on 17" Moabs (for the daily grind) ][ 35x12.50R17LT BFG MT KR (for wheeling) ][ Hidden Superwinch in stock bumper][ And soooooo much more... ]

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    Lifetime Member Getting Dirty Sal-XK's Avatar
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    I think the QD2 XK's are having this issue more then anything because the amount of torque you guys can get to one wheel maybe. But the good news is I think JBA is going to make there super CV's and steel diff for the XK\WK after all. Chris will no for sure I think he's hinting at getting them. But this is why a tread lightly with the front especially careful not to make them spin to much. But that looked like an awesome trail man!

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    Senior Member Getting Dirty Omelet's Avatar
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    The bad news is it sounds like the steel diff won't work with the QD2 ELSD. I have yet to hear if the new shafts will work with the OEM diff or only the steel diff.
    [05 WK Khaki 4x4 5.7L QDII ][ 5" SL (OME HD coils and struts) ][ 295/70/17 Nitto Trail Grapplers on 17" Moabs (for the daily grind) ][ 35x12.50R17LT BFG MT KR (for wheeling) ][ Hidden Superwinch in stock bumper][ And soooooo much more... ]

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    Lifetime Member Getting Dirty Sal-XK's Avatar
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    Quote Originally Posted by Omelet View Post
    The bad news is it sounds like the steel diff won't work with the QD2 ELSD. I have yet to hear if the new shafts will work with the OEM diff or only the steel diff.
    If he makes the CV's only compatible with the steel diff that would suck and he would loose money I would think.

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    Senior Member Getting Dirty Omelet's Avatar
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    My thoughts exactly! I really hope they are compatible with the OEM diff and that it doesn't cost too much.

    Has anyone tried the SRT chromoly shafts? Or know if they will even work?
    [05 WK Khaki 4x4 5.7L QDII ][ 5" SL (OME HD coils and struts) ][ 295/70/17 Nitto Trail Grapplers on 17" Moabs (for the daily grind) ][ 35x12.50R17LT BFG MT KR (for wheeling) ][ Hidden Superwinch in stock bumper][ And soooooo much more... ]

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    Lifetime Member Getting Dirty TrialByFire's Avatar
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    Quote Originally Posted by Omelet View Post
    Wow! How much have the NAPA ones been costing you? Do you happen to have a PN for both sides?
    The driver side is: NMD 958415
    The passenger side is: NMD 958414

    They run about $62 each with a core return ($140 w/o)
    The NAPA ones listed as "New" are not available.

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    Lifetime Member Getting Dirty TrialByFire's Avatar
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    Quote Originally Posted by Sal-XK View Post
    But that looked like an awesome trail man!
    It is a great trail about 75 miles south of Albuquerque! This was my third time on it (the first two w/o breaking) so I let the wife give it a go.
    The remanufactured shafts may be the problem, but I don't remember the first OEM shaft I broke looking any different.

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