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Thread: I've had it.

  1. 28th December 2007, 08:33 PM #1
    B92 8NW
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    Angry I've had it.

    I've got no idea what the hell is going on with my gearbox.

    I mentioned that I couldn't select 1st as I thought the clutch was dragging. Then I appeared quite the tool when it worked fine for my mechy. Well on boxing day, after landing no bargains at Shepparton Ray's Outdoors, the synchro on gear 1 seemed to self destruct in the depths of Strathbogie. Got it back to my place, provided I double declutched it was fine, in fact "magically" smooth.

    Drove 300kms with it grinding to buggery at every set of lights yesterday. Starting ringing places to have the transmission rebuilt...

    ...until this morning, it was fine and I was able to drive all the way back to Melbourne without a problem. It shifted excellently through every gear...

    ...until work this evening when it regressed into its unsynchro state.


    I thought when I bought a Disco I was giving up the half synchro IIA box, so tell me, why the hell should I drive the disco if I have a half synchro IIA to drive????

    How could it possibly intermittently lose synchro???

    PS. There was a correlation between temperature and synchro faults, however as of yesterday it was grinding from dead cold in the morning to full operating temp on the highway under load.

    Dropping the fluid in 30mins as its currently too hot, shame as it was bloody expensive synth ATF and its only been in 4.5k, I'm expecting to lots of metallic rubbish.

    Anyone got an LT77, preferably 93-94?
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  2. 28th December 2007, 08:45 PM #2
    mcrover Guest
    I'd be more looking at your clutch master cylinder.

    When your doubling it is increasing the amount of throw on the clutch fork and then you can get gears.

    If not the master cyl then probably likely to be the clutch.

    If the syncro broke you would most likely have no drive in 1st.
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  3. 28th December 2007, 09:09 PM #3
    Graeme
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    Joel,
    Did you try selecting 2nd instead of 1st, then 1st (quickly) once 2nd has stopped the box? Does selecting 2nd also grind, or is quite hard to engage? Yes to either suggests the clutch isn't disengaging.
    MY21.5 L405 D350 Vogue SE with 19s. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
    VK2HFG and APRS W1 digi, RTK base station using LoRa
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  4. 28th December 2007, 09:12 PM #4
    DEFENDERZOOK's Avatar
    DEFENDERZOOK
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    with the vehicle stationary........if you press the clutch just once.....and hold it for a few seconds.....can you select reverse.....?


    if you pump the clutch a few times......can you then select first without any crunching.......?


    and if you are in first....with your foot on the clutch......will it start to creep away after say 30-60 seconds...such as waiting at an intersection in gear ready to take off.........?
    make sure there is noone infront of you when you do this test......as you wont be able to pull it back out of gear unless you either take off.....or switch off the engine......


    let us know your results......
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  5. 28th December 2007, 09:18 PM #5
    Graeme
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    I agree with MCROVER - clutch master cylinder working properly only sometimes.
    MY21.5 L405 D350 Vogue SE with 19s. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
    VK2HFG and APRS W1 digi, RTK base station using LoRa
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  6. 28th December 2007, 09:27 PM #6
    B92 8NW
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    Quote Originally Posted by DEFENDERZOOK View Post
    with the vehicle stationary........if you press the clutch just once.....and hold it for a few seconds.....can you select reverse.....? Yes, it selects reverse correctly after 2-3 seconds.


    if you pump the clutch a few times......can you then select first without any crunching.......? No, pumping the clutch a few times doesn't make a difference, it still crunches.


    and if you are in first....with your foot on the clutch......will it start to creep away after say 30-60 seconds...such as waiting at an intersection in gear ready to take off.........? Nope, it doesn't start to creep away
    make sure there is noone infront of you when you do this test......as you wont be able to pull it back out of gear unless you either take off.....or switch off the engine......


    let us know your results......
    Hi defenderzook

    as above

    regards,
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  7. 28th December 2007, 09:31 PM #7
    B92 8NW
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    Quote Originally Posted by Graeme View Post
    Joel,
    Did you try selecting 2nd instead of 1st, then 1st (quickly) once 2nd has stopped the box? Yes I've tried that, but it still does not engage 1st unless I allow the vehicle to roll to a complete stop. Does selecting 2nd also grind, or is quite hard to engage? Yes to either suggests the clutch isn't disengaging. 2nd doesn't grind nor is it hard to engage, but it has always had a slight normal LT77 "notchiness"
    Hi Graeme,

    as above

    Regards,
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  8. 28th December 2007, 09:38 PM #8
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    DEFENDERZOOK
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    Quote Originally Posted by joel_nicholson View Post
    Hi defenderzook

    as above

    regards,



    well....that eliminates the clutch........the problem must lie in the box......
    not what you wanted to hear......
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  9. 28th December 2007, 09:48 PM #9
    B92 8NW
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    Quote Originally Posted by DEFENDERZOOK View Post
    well....that eliminates the clutch........the problem must lie in the box......
    not what you wanted to hear......
    ****

    Probably a good time to admit too, that at 290,000 km half a circlip drained out of the gearbox. Now have 305,500 notched up.
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  10. 28th December 2007, 09:53 PM #10
    DEFENDERZOOK's Avatar
    DEFENDERZOOK
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    the damage may not be too bad.....yet.....


    avoid driving it till you can investigate it further.........
    in laymans terms......stop driving it or you will do more damage......
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