Keaton944

Howdy folks, the car in question is my 86 944na, late model dash. It gets driven often as it is my daily driver, but when it has set for a day or sometimes even overnight, the speedo will not work until i shift into 2nd gear and get around 40mph. Once it does start working, it will continue to work. When i slow down below 40-0mph it works fine. and if i stop the car and then start it again it works fine. But once it has sat for 12 hours or so, it doesn't kick in until ~40mph...

Any suggestions on what is going out and what i should check?

Thanks,
Keaton

dirtyTurbo

Clean the connections on the sensor on the transmission. I used to never have a speedometer unless it was raining

Keaton944

thanks! could you give me a general location on where it is at on the transmission? i couldnt find any info about it on clark's garage, and i cant seem to find my haynes manual atm.

944_S_TYPE

Try This:

Perhaps the cable is damaged or sticking?

http://www.944online.com/cgi-bin/for...num=1278017722

Funn944

Check the speed sensor on the tranny and it's wiring. The speedo is electronic device except for the sender in the tranny.

944Ross

The senders do wear out, too. Mine became intermittent, before finally dying. They have a spinning magnet and a miniature reed switch that creates pulses. Reed switches have a very finite lifespan.