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Thread: Help please - Fitting a 300 tdi Defender Speedo Cable

  1. #1

    Default Help please - Fitting a 300 tdi Defender Speedo Cable

    Hi All,
    Would be grateful for some simple advice.

    I don't have a drive and unless I take it to my father in law's, I have to work on my 300 Tdi Defender in the busy and steeply cambered road outside my house which makes getting underneath unpleasant/dangerous so I try to schedule jobs that need work underneath or jacking up etc for visits to his.

    I need to change speedo cable - can I get at the transfer box end from on top? I am about to replace the drivers side footplate and will be having the gearbox tunnel cover off or if it needs access from underneath, I'll save it for another day.
    Any help gratefully received.

    Cheers,
    Jerry


    1996 300 Tdi 110 CSW

    www.off2africa.net

  2. #2
    Engineer naylz's Avatar
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    Yes access it from above, remove the centre cubby box or seat and unscrew the plate beneath it and remove. You will see the speedo cable going into the transfer box, it's between the handbrake drum and main box you really cannot miss it, it is held in place by a fork type clamp, slacken the 10mm holding nut ( don't need to undo nut completely) and you will be able to remove the speedo cable.

    Tip; clean all the crud away first as you don't want it to drop into the transfer box.
    If at first you dont succeed........... come on here and find out how its done properly!

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    Engineer naylz's Avatar
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    Just out of interest what is wrong with your existing speedo cable?
    If at first you dont succeed........... come on here and find out how its done properly!

  4. #4

    Default Re: Help please - Fitting a 300 tdi Defender Speedo Cable

    Quote Originally Posted by naylz View Post
    Just out of interest what is wrong with your existing speedo cable?
    Clicking and jumping around - is there an alternative to replacing?

    Cheers
    Jerry


    1996 300 Tdi 110 CSW

    www.off2africa.net

  5. #5
    Engineer naylz's Avatar
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    I would firstly check the cable is fully pushed into the back of the gauge, it will do as you describe if it isn't, if you have pulled the dash instrument unit forward at any time to renew a bulb or whatever the chances are its not fully engaged so you will get a jumping needle. It's the same at the other end but you may as well unclamp it and inspect the end for damage whilst you have access to it. Another reason but less likely is you have trapped the cable somewhere along it's length
    If at first you dont succeed........... come on here and find out how its done properly!

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    Engineer naylz's Avatar
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    If the clicking is from the gauge end then it most likely does just need pushing back in. Sometimes the plastic shroud breaks, easily fixed with some electrical tape
    If at first you dont succeed........... come on here and find out how its done properly!

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    Engineer WestRec214H's Avatar
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    Default Re: Help please - Fitting a 300 tdi Defender Speedo Cable

    Quote Originally Posted by Kernow64 View Post
    Clicking and jumping around - is there an alternative to replacing?

    Cheers
    yes, buy & fit the TD5 instrument pack lots of info here wibbly wobbly speedo & a more condensed version here Installing a Defender Td5 Instrument Pack into a 200Tdi/300Tdi

  8. #8

    Default Re: Help please - Fitting a 300 tdi Defender Speedo Cable

    Quote Originally Posted by naylz View Post
    If the clicking is from the gauge end then it most likely does just need pushing back in. Sometimes the plastic shroud breaks, easily fixed with some electrical tape
    Thanks, I'll have a look tomorrow - ran out of time today.
    Jerry


    1996 300 Tdi 110 CSW

    www.off2africa.net

  9. #9

    Default Re: Help please - Fitting a 300 tdi Defender Speedo Cable

    Quote Originally Posted by WestRec214H View Post
    yes, buy & fit the TD5 instrument pack lots of info here wibbly wobbly speedo & a more condensed version here Installing a Defender Td5 Instrument Pack into a 200Tdi/300Tdi
    Interesting idea but probably beyond my skills as an auto-electrician and I like the lack of electronics on my Tdi. Thanks for thoughts though.
    Jerry


    1996 300 Tdi 110 CSW

    www.off2africa.net

  10. #10
    Engineer naylz's Avatar
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    Electrickery in a defender, we all know water and electrics don't mix
    If at first you dont succeed........... come on here and find out how its done properly!

  11. #11
    Engineer WestRec214H's Avatar
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    Default Re: Help please - Fitting a 300 tdi Defender Speedo Cable

    Quote Originally Posted by Kernow64 View Post
    Interesting idea but probably beyond my skills as an auto-electrician and I like the lack of electronics on my Tdi. Thanks for thoughts though.
    it easy to do, no major rewiring

  12. #12

    Default Re: Help please - Fitting a 300 tdi Defender Speedo Cable

    Quote Originally Posted by Kernow64 View Post
    Thanks, I'll have a look tomorrow - ran out of time today.
    Finally got OEM replacement speedo cable fitted today. Plastic "shroud" (?) had snapped and maybe could have been fixed with tape but I had already sourced a replacement cable.

    Still a bit noisy (hopefully just bedding in) but needle is rock solid throughout range - before it was all over the place until 50 mph when it started behaving itself.

    Still reads about 5% fast on 235 85 R16 BFG M/Ts
    Jerry


    1996 300 Tdi 110 CSW

    www.off2africa.net

  13. #13
    Engineer WestRec214H's Avatar
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    Default Re: Help please - Fitting a 300 tdi Defender Speedo Cable

    a 300tdi should have the FRC3310 speedo drive gear, blue with 20 teeth, this works well with tyres from 7.50 inch wide, your existing tyres & my 255/85 tyres, I 've had all 3 sizes on my 110, with no speedo read problems.

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