Vehicle & Technical > Discovery

Speedo drive

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denzil:
Hi folks
I need some advice, started to change the transfer box on my 1996 3.9 for a 1.2 90 box today .The 90 box has a square speedo
cable drive the existing box has a small plug in the roughly the same position. Is there a square drive under the plug, if not any ideas
as to a way around this problem  ?.

Regards  Denzil

SteveGoodz:
Denzil,

Your 1996 Discovery has an electronic speedo and the Defender has a mechanical one.

AFAIK they're not compatible.

Saffy:
if both are LT230 boxes you should be able to swap the drives around, unless you mean by 'plug' a blank hole? - then no there is nothing underneath and there isn't any teeth on the driving gear either so can't machine blank to fit speedo drive.

denzil:
Thank you saffy both 230 boxes, sorry I meant electrical type plug . I will carry on removing the existing box later if there is a chance I can swop the drives did not want to go to far if I was not going to be able to reconnect the speedo.

Regards Denzil

Saffy:

--- Quote from: denzil on August 31, 2010, 07:06:31 ---Thank you saffy both 230 boxes, sorry I meant electrical type plug . I will carry on removing the existing box later if there is a chance I can swop the drives did not want to go to far if I was not going to be able to reconnect the speedo.

Regards Denzil

--- End quote ---
it's popular to retro fit the defender TD5 speedo into an older tdi defender and also the electro-mechanical speedo pickup need to be swapped with the tdi's mechanical pickup, so that's what I base the comment 'if both are LT230 boxes you should be able to swap the drives around'.

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