speedo sensor problem

[ERIC340R]

hello all

i need your help, i have the tackymetre (speedo ) that doesn't work well on my tvr. sometime it work and stop without any reasons on my t350c.
do you have an idea of the solution?

thanks all for answers

[Targarama]

Sender unit is the probably culprit. It is located on the rear diff. Might just need cleaning, but replacement isn't too hard. You need to make sure the gap is set correctly.

[konrad.holl]

Don't forget to thoroughly clean the gearwheel. Can be a pain but helps a lot...

[VARLEYHYD]

G

[ERIC340R]

i did a complete cleaning already ad less than 1 mm on adjusting. i don't hev the blue unit but grey one.