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Thread: Low / High Ratio Gearbox

  1. #1
    Gofer/teaperson barker_gaj's Avatar
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    Default Low / High Ratio Gearbox

    Hi

    I'm new to this forum, and am thinking about buying a 2004 Land Rover Defender 110 TD5 - I'll be drving it in the French Alps (using it as a skibus).

    I've seen a few posts on how to use the low / high ratio gearbox, but am still a little confused about it, and have the following questions:

    - Does the car have permanent 4wd? Even if it's in high range without the diffs locked?
    - Is the best setting for snow / ice, high ratio & diffs locked?
    - Would I ever need to use low ratio for driving in snow and ice?
    - Can you change to high ratio & diffs not locked without stopping? I ask this because some of the smaller roads I'll be driving on will be very snowy and icy, and then I'll get onto a main road which will be relatively clear (having been snow-ploughed and gritted).

    I'd also like to know whether anyone has any opinions about Cooper snow tyres.... The garage I'll buy the Land Rover from is proposing to fit them for me.

    Thanks very much for your help, and apologies for the dumb questions....!

    Cheers

    Garrett

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    Default Re: Low / High Ratio Gearbox

    Welcome Garrett

    First. Ratio and gearing are two different things.Low ratio = High gearing and High ratio = Low gearing, Even Land Rover don't appear to know that.

    So
    For the sake of this converstaion well talk Hi box and Low box.

    Yes permanent four wheel drive.

    Diff lock. Which ever suits the conditions. Hi or Low.....

    Again I guess you mean low box. Yes at times you could. very slow road speed at tickover.

    I regularily range change Hi to Low and Low to Hi when driving. The transfer box is just a normal non synchro gearbox. You'll need to double de clutch each change.
    ALSO
    You can change into and out of difflock when moving. The wheels MUST NOT be spinning to do this.

    That's the way I would do it. Others will have different ideas.

    Not used Coopers so can't comment.

    No silly questions. Everybody has to learn.

    HTH

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    Consultant Ben Breese's Avatar
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    Default Re: Low / High Ratio Gearbox

    Just to add to Mike's post, when you do get onto the tarmac/ gritted roads, if there's plenty of grip, take it out of difflock. DON'T drive in difflock on hard surfaces, you'll wind up the transmission. If it won't come out of difflock, then stop and reverse, it should come out then.

    Cheers, Ben
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    Default Re: Low / High Ratio Gearbox

    Thank you Ben.....I'd forgotten that.
    ALSO
    Make sure the difflock warning light is always working. The light tells you the difflock is engaged. Make sure you know that.

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    Gofer/teaperson barker_gaj's Avatar
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    Default Re: Low / High Ratio Gearbox

    Hi both

    Thanks for your very helpful advice - will let you know how I get on...!

    Cheers

    Garrett

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