93 Griffith 4.3LHD no transducer sensor in diff?

[HVGRIFF430]

My speedo fals out after about 3-4mls driving. Then suddenly it lives again while driving, then it fals out again. Everytime when cold it works about 3-4mls sometimes a little longer. Now i am checking the sensors. I was reading the forum and they talk about a sensor in the gearbox and on on the diff.
Mine has none on the diff. Is this possibel? My car has the rover box.

Thank you

[HVGRIFF430]

Forgot to mention, it has the stewart warner gauges.

[Oldred_V8S]

HVGRIFF430 said:

My speedo fals out after about 3-4mls driving. Then suddenly it lives again while driving, then it fals out again. Everytime when cold it works about 3-4mls sometimes a little longer. Now i am checking the sensors. I was reading the forum and they talk about a sensor in the gearbox and on on the diff.
Mine has none on the diff. Is this possibel? My car has the rover box.

Thank you

It will be in the gearbox if it is an LT77 (Rover) gearbox.

[phillpot]

Have you got one like these in the gearbox?

https://partsfortvrs.com/tvr-parts/part-details/tv...

https://partsfortvrs.com/tvr-parts/part-details/tv...

[HVGRIFF430]

Yes it has. What is strange on the racing green site ,that the one transducer is fit from chassisnr 1925 onwards from may 1992 until the T5 gearbox came,the other earlier. My car is chassisnr 1153 and from January 1993 ......so will it be 8 pulse or 4pulse ??

[HVGRIFF430]

I think it is also not so easy to get it out with the gearbox in the car?

[phillpot]

HVGRIFF430 said:

......so will it be 8 pulse or 4pulse ??

The Million Dollar question!

There is a small hole here, if you stick a pin or similar in you will feel it touch something, eight or four times per revolution

HVGRIFF430 said:

I think it is also not so easy to get it out with the gearbox in the car?

Yes, you can change it with the gearbox in the car

Edited by phillpot on Tuesday 15th June 17:53