Speedo drive

[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]

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

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'.

[Range Rover Blues]

I've just fitted a B-W with electric speedo pickup.  The mechanical one has a short stud that has to come out but the inner gear was a pefect fit and 10 minuted work (rusted stud) saw it all fitted and working.

Hard dash 3.9 RRC and Disco had an electronic speedo driven by a sensor bolted to the chassis leg and driven by a 6" speedo cable.  The other end of the sensor can be used to drive a speedo cable ( VERY early 14CU/CUX equiped EFi cars had mechanical speedos).

[denzil]

Thank you rangerover blues for your reply, both you and saffy seem optimistic so i will carry on removing the transfer box on saturday and see how I get on .You may here from me again.

Regards Denzil