T350 Speedo help!

[m999psw]

Hi,
I have just been to our local meet and on the way back the speedo stopped. Both the needle and digital display show zero. I have stopped and restarted and the needle flicks up as usual during the start but still the speed shows zero.

Any ideas?

Regards
Paul

[konrad.holl]

Hi Paul,

looks like your speedo sensor is broken. It's located at the diff - you need to jack your car up to exchange it (haven't done it myself yet).

Cheers,

Konrad

[fairclp]

How strange! Mine stopped working this afternoon too.

Happens quite often. I've had new sensors many a time on my previous TVRs.

[Speed Buzz]

Mine works when its cold & then stop for a while & then recovers.

Sensor is on the diff, will have to have a little look at that.

Cheers.

[LivingItNow]

How strange? How very, very strange!!! Mine did the same this afternoon in my Sag as I left the M55 m/way on my way for a tour around Blackpool.

Is ns back in the country?

[m999psw]

Thanks for the help. The car is going back to Henley on Friday to have the diff seal changed so they can have a look.

Regards
Paul

[LivingItNow]

Thanks G,

Can you enlighten a bit more about setting the 2mm gap please?

I haven't been under the car yet and on the sensor picture you put up, there doesn't appear to be a gap to set, so is it a gap within the diff itself? and if so do you wind the sensor in until it:

a) hits something?
b) goes in as far as it can?

.... and then bring it back 2mm?

Cheers
Don

Edited by LivingItNow on Monday 11th February 11:22

[VARLEYHYD]

Speedo Sensor- Adjustment/Removal/replacement (sag v similar all T cars)

More detail


Part no. M1889 £100 ish Racing Green TVR



To gain access to the Speedo Sensor the car ideally needs to be on a ramp.(jack possibly)
Remove the left NS rear wheel.



The sensor can be seen at the right of the drive shaft, horizontal to the toothed diff output.





View from underneath the car.(exhausts removed on photo)

Clean with WD40 set to 2mm gap
(guess the thread is 1mm or 1,5mm pitch so 2 turns or 3turns from no gap)
The sensor is best left, complete on the bracket if removed.


View from rear (fuel tank removed)


If replacment required use a dealer as they will have it done in a jiffy
Alternativley, remove locknuts, follow the cable through to the rear inner wheel arch where it enters the body.



The hatch trim top rail and then the left NS trim panel needs to be removed.





Unplug in the inner wheel arch and prise out the wires and sheath from the connector block.

Pull the new sensor wire through, without cutting back the wire.

Remake the connector and re fit the sensor and bracket.
Alternatively cut off at 200mm long from plug then cut back new by 200mm and join with connector block.

Check with the ignition on the speedo needle reads zero.

If the needle requires adjustment, select factory settings on POD menu 8; select the mph zero and adjust up or down until the needle is set and save the changes.

Hope this helps

G

[KillerJim]

Wow.. very nice explaination of what needs done!!

Its a real pity this information cannot be collected and stored somewhere central (aka engineering manual) for those of us who want to get under the car...

James

[VARLEYHYD]

KillerJim said:

Its a real pity this information cannot be collected and stored somewhere central (aka engineering manual) for those of us who want to get under the car...

James

Well it is if you know where to go to




G

Edited by VARLEYHYD on Friday 15th February 11:53

[LivingItNow]

G,

Brilliant piece of work...

Guess that answers my question rather well. Many thanks.

Off to get the jacks out....

Cheers
Don

[LivingItNow]

Hey G,

Any chance of a pdf of the Sag workshop manual?

If you reply here first and you can do one, I'll contact you at VHYD to give you my home e-mail.

Cheers
Don.

[KillerJim]

I need that manual in my life

I`m sure alot of people (including myself) would want to get/purchase the Sagaris workshop manual. I intend to get deep inside my Sagaris as soon as I move house (with a BIG garage )

James

[LivingItNow]

After cleaning the sensor and checking the gap as G suggested; no change. Still faulty.

Booked the Sag' into Track V Road who fitted a new speed sensor and all working again! Yipee!!

Cheers G for the excellent advice.

[Targarama]

KillerJim said:

I need that manual in my life

I`m sure alot of people (including myself) would want to get/purchase the Sagaris workshop manual. I intend to get deep inside my Sagaris as soon as I move house (with a BIG garage )

James

'A lot of people' - well indies/dealers and the 180 or so Sagaris owners you mean :-)