Speedo Transducer - Home Job?
Discussion
My spedo stopped working and all the TVR guru did was to narrow the gap, apparantly common problem (especially in very wet conditions)....Also the newer transducer with the blue cable is the one to go for. Typical TVR , on the box, it says this product is NOT WATERPROOF 
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.Edited by glow worm on Thursday 27th December 15:22
It's ok I'm a novice too.
1. Jack the car up. I used a trolley jack to jack up the full rear of the car.
2. Remove nearside rear wheel.
3. Ensure car is completley safe and thet there is no possibility of movement or accidental lowering. - Very important as you do need to reach right under the car. If a t all unsure - take it to a garage with ramps.
4. Locate the speedo transducer. To the right of the toothed drive shaft.
5. The transducer hs a 17mm nut on both the left and right side. Loosen the left side then adjust the gap by loosenng the right nut.
6. Tighten the left hand nut and then check the gap. Should be 2mm. If you're not happy with the gap repeat the process.
7. I also took the oportunity to clean the sensor with WD40 and a piece of cardboard that fitted tightly in the gap. (there was a lot of dirt which could have been he problem).
Best of luck.
Spluffy
1. Jack the car up. I used a trolley jack to jack up the full rear of the car.
2. Remove nearside rear wheel.
3. Ensure car is completley safe and thet there is no possibility of movement or accidental lowering. - Very important as you do need to reach right under the car. If a t all unsure - take it to a garage with ramps.
4. Locate the speedo transducer. To the right of the toothed drive shaft.
5. The transducer hs a 17mm nut on both the left and right side. Loosen the left side then adjust the gap by loosenng the right nut.
6. Tighten the left hand nut and then check the gap. Should be 2mm. If you're not happy with the gap repeat the process.
7. I also took the oportunity to clean the sensor with WD40 and a piece of cardboard that fitted tightly in the gap. (there was a lot of dirt which could have been he problem).
Best of luck.
Spluffy
Hi Guys
On the way to delivering my car to the NEC on Wednesday my speedo packed up. I seemed to recall diagnostic code A at the same time?? The digital read-out is fine, it is the sweep hand on the speedo which has stopped. It is now parked in hall 12 of the NEC doing 28mph!
Is this the same problem as outlined above? Is it a case of cleaning/adjusting the transducer?
If so I'm very grateful for the step by step guide - thanks spluffy.
Art
On the way to delivering my car to the NEC on Wednesday my speedo packed up. I seemed to recall diagnostic code A at the same time?? The digital read-out is fine, it is the sweep hand on the speedo which has stopped. It is now parked in hall 12 of the NEC doing 28mph!
Is this the same problem as outlined above? Is it a case of cleaning/adjusting the transducer?
If so I'm very grateful for the step by step guide - thanks spluffy.
Art
OK here we go for a tiver in need:-
Speedo Sensor- Removal/replacement (sag v similar all T cars)
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
The sensor is best left, complete on the bracket if removed.
View from rear (fuel tank removed)
Remove locknuts, follow the cable through to the rear inner wheel arch where it enters the body.
The boot 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.
Check with the ignition on the speedo needle reads zero.
If the needle requires adjustment, select factory settings on POD menu 8; select the rpm zero and adjust up or down until the needle is set and save the changes.
Hope this helps
G
Speedo Sensor- Removal/replacement (sag v similar all T cars)
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
The sensor is best left, complete on the bracket if removed.
View from rear (fuel tank removed)
Remove locknuts, follow the cable through to the rear inner wheel arch where it enters the body.
The boot 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.
Check with the ignition on the speedo needle reads zero.
If the needle requires adjustment, select factory settings on POD menu 8; select the rpm zero and adjust up or down until the needle is set and save the changes.
Hope this helps
G
Edited by VARLEYHYD to inc. extra info
Edited by VARLEYHYD on Friday 11th January 21:00
art nouveau said:
On the way to delivering my car to the NEC on Wednesday my speedo packed up. I seemed to recall diagnostic code A at the same time?? The digital read-out is fine, it is the sweep hand on the speedo which has stopped. It is now parked in hall 12 of the NEC doing 28mph!
Art,Dead speedo needle but working digital readout is normally a pod failure - the stepper motor operating the needle has been known to fail. The symptoms for a sender problem manifest themselves on both needle and digital readout equally.
Cheers,
Pete
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