Discovery 2: Disco 2 auto gearbox problems...





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  1. #1
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    Default Disco 2 auto gearbox problems...

    Hi Guys

    I am having a few issues with my auto gearbox on disco 2. Over the last few days it is been as if the clutch is slipping through the gear changes. Also in the mornings i have to give extra revs in order to get into gear. This morning however, she just does not want to move?? could this be i am low on oil? yesterday all was fine except the gears sounded as if they were slipping and now i have nothing. She did move in reverse though for about 3meters ......
    2001 Disco 2 TD5 Auto
    2007 Disco3 TDV6 HSE
    Buy a Land Rover, Buy a hobby....
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  2. #2
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    I would definitely look at oil level first.

    How to do this:
    Loosen the oil filler plug on the front of the gearbox but don't remove it.
    Get ready with your ATF
    Start the engine, then remove the plug
    Add ATF till it overflows
    Get in the car, hold the brake on, move the selector all the way from P to 1 stopping for a few seconds in each gear.
    Go back to P, get out and fill again till it overflows
    Put the filler plug back
    Test drive, or switch off engine
    Rob
    Defender 90 pickup. Lexus V8, Spitronics, 33" KL71, beadlocks, +2" Terrafirma, ATB's, 3.75 CW&P, 1.21 TC.
    Series IIA 88" pickup
    Disco 2 ES TD5
    Disco 1 ES 300TDi
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  3. #3
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    Thanx Rob

    I will do that first thing tomorrow and let you know of the outcome.

    Garry
    2001 Disco 2 TD5 Auto
    2007 Disco3 TDV6 HSE
    Buy a Land Rover, Buy a hobby....
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  4. #4
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    If you can "hear" the gears slipping inside the autobox it means you need to open her up.

    Unlike in a manual gearbox the only "gears" in your auto are one way clutches that switch clutch packs (these dont have gears). Your comment on reverse gear also make me think in those lines. Most common is the H-sprag clutch which fail on these boxes.

    But, for safety at this stage - drain all the oil and drop the sump. Have a look at the oil colour and smell, it shouldn't be dark red and it shouldn't smell burnt. Have a look inside the sump for any signs of metal filings on the magnet. Don't do more harm to the box at this stage by forcing things, it wont fix itself...

    Once you're satisfied with those being ok, refill as per Rob's instructions above.
    Last edited by DiscoMad; 2012/07/15 at 07:53 PM.
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  5. #5
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    Thanx Jakes,
    There was no noise of gears slipping when i was driving it. It just felt like it was a manual with the clutch slipping before the gears would change Also the revs were much higher before the change would take place. 3000 revs + before she would change. Once warm she would change gears normally. This morning though she decided not to move just revs high. No noises of gears cluncking at all though.

    Regards

    Garry
    2001 Disco 2 TD5 Auto
    2007 Disco3 TDV6 HSE
    Buy a Land Rover, Buy a hobby....
    Useful Link:
    www.dicovery2.co.uk

  6. #6
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    Either you are low on fluid or the line pressure is not being maintained (dont know what mechanism that box uses)

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  7. #7
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    Well that's good news then!

    Yes hopefully you're just low on ATF. The line pressure is two fold, firstly you have the pump itself which is driven by the outer casing of the torque convertor. Secondly there is a pressure regulator spring and valve on the valve body inside the gearbox.

    That said, what you describing could be a solenoid that's gotten lazy. Note the valve body on these gearboxes are fairly complex units and can suffer failure from debris or gunk getting passed the filter.

    Its not a major task to clean the valve body, but I wouldn't recommend it for a first timer or as a DIY 30min project.

    Pls don't get the gearbox flushed - no debate here, it just causes sh_t.

    If I can recommend a possible "fix", drain the current fluid. Take the sump off (6x10mm bolts), inspect and replace the filter. Let it drain for at least an hour or longer. Put fresh ATF in and drive it. Drain again and refill with fresh ATF.

    This might loosen up some fine gunk preventing a solenoid from operating correctly.

    Lets hope its just oil level hey
    Driven by passion
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  8. #8
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    Cheers Guys

    I am going to drop the sump and do the necessary as you have all mentioned. Had a look underneath and there is a small pool of oil so suspect i do have a small leak somewhere. Any miraculous ideas on how the hell you fill up again through the fill hole?? Cannot just pour oil straight in there is no space......

    Garry
    2001 Disco 2 TD5 Auto
    2007 Disco3 TDV6 HSE
    Buy a Land Rover, Buy a hobby....
    Useful Link:
    www.dicovery2.co.uk

  9. #9
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    Get a funnel, 1m of garden hose, some insulation tape and a 10mm pipe about 100mm long.
    Wrap tape round one end of the little pipe until it can fit snugly into the hose. Shove the funnel into the other end of the hose. Wedge the funnel in the engine bay between the engine and water head tank and hang the other end near the box. When the cap is off, shove the pipe in and fill from the top.

    Or you can steal the wife's poison pump but don't get caught.
    Rob
    Defender 90 pickup. Lexus V8, Spitronics, 33" KL71, beadlocks, +2" Terrafirma, ATB's, 3.75 CW&P, 1.21 TC.
    Series IIA 88" pickup
    Disco 2 ES TD5
    Disco 1 ES 300TDi
    Subaru impreza WRX
    Porsche Boxster S
    Shamrock Cobra 350
    Buell XB12R

  10. #10
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    These are dirt cheap and does a decent job.
    Attached Images Attached Images  
    Driven by passion
    Jakes 071 9855 258

  11. #11
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    Thanx Guys for all the help. The Land Rover Ferrari is back in business. Topped up the oil for now and all is fine, car has all the power back now up hills. Off to buy the filter kit and will do the filter and gasket changes and renew the oil again.Thanx for the advice on refill, actually did use the wifes poison pump after a good clean. Need to say she is not happy.
    Thankyou again Rob, Jakes, Marius for all your help. Hope i will be able to return the favour someday.
    Regards
    Garry
    2001 Disco 2 TD5 Auto
    2007 Disco3 TDV6 HSE
    Buy a Land Rover, Buy a hobby....
    Useful Link:
    www.dicovery2.co.uk

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