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jav-uk

Member Since: 29 Mar 2010
Location: Shropshire
Posts: 112

2014 Defender 110 Puma 2.2 SW Alpine White

I had a GKN overdrive on my old TD5, nice piece of kit and I remember changing the speed sensor for
an issue very similar to the one you describe. Paul

Pondering a New 90 Commercial
2020 Evoque
* 2014 110 SW JE Stage 2.
*2010 110 Utility. JE Stage 2.
*2007 110 SW
*2003 90 JE Stage 2.
*2000 90 SW

If its not leaking it ain't full.

12th Jan 2014 2:02pm

Clive

Member Since: 21 Mar 2014
Location: Littleborough
Posts: 467

2004 Defender 90 Td5 X-Tech LE Zambezi Silver

hxk494 wrote:
Don't know if you saw the thread which I started about my non-functioning (now fixed) GKN?

http://www.defender2.net/forum/topic20322.html

Was my speed sensor (smaller early type) which was at fault - I also have a spare late type sensor which could be up for sale if it turns out that is what you need.

Cheers,
Martin.

Hi Martin, I'm probably quite a bit late to the party on this but do you still have that "late type sensor"?

My GKN O/D stopped working recently, I've checked it out and found the speed sensor is open circuit, (I would expect a resistance of about 300 ohms or so,) it's the later 16mm thread type so the RS one wouldn't fit and Devon 4x4 don't appear to list it anymore, only a kit to bypass the controller, I'd rather keep it intact if possible.

So if you still have it and would be willing to part with it for a reasonable fee, I'd be happy to take it off you.

14th Sep 2017 11:48am

Guillaume

Member Since: 16 Aug 2018
Location: France
Posts: 2

Dear Martin,

I new on the forum, just subscribed from France, as I can see you may have an available speed sensor for GKN overdrive.

My sensor just failed and I am looking for a spare.

I you are ok to sell it, please let me know.

Regards,

Guillaume.

16th Aug 2018 9:43am

Clive

Member Since: 21 Mar 2014
Location: Littleborough
Posts: 467

Hi Guillaume

My comment on the thread, just above, was in response to a much earlier comment (in 2014) by hxk494, I didn't hear back so I set about finding another solution.

I eventually found a sensor with approximately the right dimensions from a Ford Focus that was being scrapped, I think it was a cam position sensor, but they're mostly pretty much the same inside, I had to remove the old GKN sensors inner parts from its outer threaded sleeve and ream the inside out by about 1mm or so to accommodate the plastic body of the replacement unit, this was then fixed in place with epoxy resin with the outer face flush with the bottom.

it now works perfectly

16th Aug 2018 10:08am

Guillaume

Member Since: 16 Aug 2018
Location: France
Posts: 2

Hi,

Thanks for your reply. That confirms I should be able to use a standard inductive sensor.

Standard sensor are available with M12 and M18 thread but not with M16x1.5 as the original GKN one.

However, it should be possible to use an M12 sensor with a thread adaptor M16 to M12. Sould works.

Thanks for your help.

Guillaume

16th Aug 2018 2:19pm

Clive

Member Since: 21 Mar 2014
Location: Littleborough
Posts: 467

As you say, it should work, just be careful though that you measure and set it to the correct depth, it needs to be very close to the wheel inside but obviously not touching.

16th Aug 2018 5:37pm

26hoggy

Member Since: 09 Oct 2018
Location: Kent
Posts: 1

Hi can you tell me more information regards the focus speed sensor you used on your overdrive please, many thanks in advance

9th Oct 2018 6:49pm

Clive

Member Since: 21 Mar 2014
Location: Littleborough
Posts: 467

Not much to say really, appears to be a common part, looks like this -

https://www.banggood.com/Crankshaft-Positi...5852.html?

I had already removed the original sensor from the overdrive and removed the guts of it leaving essentially a threaded metal tube with a hex nut half way up.
The replacement (Ford) sensor was slightly larger in diameter than the hole in the tube so I had to ream the tube out slightly to get it to fit, the result was as below -

Click image to enlarge

9th Oct 2018 9:09pm

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