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Thread: Disco Diagnosis

  1. 13th November 2006, 11:02 PM #1
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    Disco Diagnosis

    Travelling to Ace and Mick's recent Stockton beach adventure I was experiencing some unusual steering vibration at above 80kph. A severe tripple wobble about every second or two. Then, after airing down and approaching the beach, I became aware of a loud 'chirping' coming, intermittently, from the front of the vehicle and lastly while shifting from forward to reverse on the sand I was concerned that the 'clunking' was louder than usual. At the last service the front wheel bearings had been inspected/replaced because of signs of water entering the hubs and I was concerned that the service had not been carried out properly and was the cause of my problems.
    Finally I bailed from the trip because I was getting paranoid about damage to the CVs, Hub bearings etc.
    I've since had the front wheels rebalanced (one wheel was badly out) which seems to have fixed the steering wobble. Checking out the underside of the Disco, prior to taking it back to the mechanics to be diagnosed, revealed some problems with one of the uni's on the front driveshaft. It looks like two of the cups are damaged and alowing a lot of slop and 'clunk' in the uni. (This would explain the loud noises when changing direction).
    I'm currently working on dismantling the damaged uni joint and would be grateful for any advice regarding repair/reconstruction.
    I'm hoping this is the cause of the chirping as well, but time will tell.
    So, step 1 - what parts do I need to repair the uni joint?
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  2. 14th November 2006, 05:08 AM #2
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    A uni joint kit, should run you about $20-30 for greasabel ones... just goto any bearing place, driveline specialist, hell even repco/supercheap and autobahn have trouble screwing this one up.

    If it comes apart easy put a little antisieze on the outside of the bearing cups before putting it back together

    If its not playing the game coming apart, feel free to butcher the cross bit in the middle as hard as you like so long as you dont bend, score, cut, overheat or otherwise damage the yokes that hold the bearing cups.
    Dave

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  3. 14th November 2006, 08:20 AM #3
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    Use a g-clamp and some ordinary washers to press the new uni cups into the yokes - you don't knock the needle bearings out unlike when you use a hammer.
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  4. 14th November 2006, 09:41 AM #4
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    Thanks Blknight and Langy thats what I needed to know. The shaft is now removed and the uni dismantled... Hmmm...lots of little pin type bits of metal on the floor...


    Off to Repco for a new one.
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  5. 14th November 2006, 10:07 AM #5
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    Hmm, when was the last time that uni saw a grease gun ?

    Quite a while by the looks of it.
    Scott
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  6. 14th November 2006, 10:18 AM #6
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    Quote Originally Posted by Scouse
    Hmm, when was the last time that uni saw a grease gun ?

    Quite a while by the looks of it.
    Maybe it's the non-greasable type ?

    Looks like it to me, can't see the grease nipple on the elbow
    Last edited by ladas; 14th November 2006 at 10:22 AM.
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  7. 14th November 2006, 10:21 AM #7
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    Quote Originally Posted by ladas
    Maybe it's the non-greasable type ?
    You can see the grease nipple hole on the RH side (above the damaged shaft section).
    Scott
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  8. 14th November 2006, 10:21 AM #8
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    Quote Originally Posted by Scouse
    Hmm, when was the last time that uni saw a grease gun ?

    Quite a while by the looks of it.
    Yep, it's ugly isn't it? This kind of thing makes me feel so good about paying $90 an hour for professional service.
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  9. 14th November 2006, 10:24 AM #9
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    Quote Originally Posted by DiscoDave
    Yep, it's ugly isn't it? This kind of thing makes me feel so good about paying $90 an hour for professional service.
    In that case Dave, take the shaft to the service guy & get him to replace the uni .
    And tell him the grease nipple isn't there for decoration while you're at it.
    Scott
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  10. 14th November 2006, 10:25 AM #10
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    Quote Originally Posted by Scouse
    You can see the grease nipple hole on the RH side (above the damaged shaft section).
    eyesight check............buggered if I can see one, looked like just a hole to me.
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