Can you convert a mechanical odometer 915 transmission to electronic

[Ruf1969]

Can a 915 mechanical speedometer be converted to electronic?

[Andy Somogyi]

Originally Posted by Ruf1969

Can a 915 mechanical speedometer be converted to electronic?

Sure.

Basically what you could do is attach a flying magnet to the Inner CV flange, and mount a Hall effect sensor nearby to pick up the signal. Then read that signal with an Arduino, and use that to drive a stepper motor in a Speedo.

That’s basically what I’m doing in my 76.


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[Trackrash]

Originally Posted by Ruf1969

Can a 915 mechanical speedometer be converted to electronic?

Are you trying to put an older 915 in a newer car? What years? You may have other issues beside the speedo.

[Duc Hunter]

I did this in my 1975 car. I simply purchased an auto meter GPS sensor, and plugged it into an electronic Speedometer for my 911. It gives me really accurate speed, and works perfect.

[Ruf1969]

Originally Posted by Trackrash

Are you trying to put an older 915 in a newer car? What years? You may have other issues beside the speedo.

It's a 77 911s with a 74 915 transmission, it in the car already but I guess who ever did the transplant did not convert it.

[Ruf1969]

Originally Posted by Duc Hunter

I did this in my 1975 car. I simply purchased an auto meter GPS sensor, and plugged it into an electronic Speedometer for my 911. It gives me really accurate speed, and works perfect.

Can you send me a link or part number please.

[Matt Monson]

Originally Posted by Ruf1969

It's a 77 911s with a 74 915 transmission, it in the car already but I guess who ever did the transplant did not convert it.

Buy a 74 speedo and cable.

[Ruf1969]

I thought about that but I just wanted to see if there was an easier way, thanks.

[icarp]

yellow box converter
https://yellr dot com
what i have on my 72