digital

My plan was to use a mechanical speedometer and cable from the ZF 25-2 transaxle . I wonder if there are senders to connect on the ZF ? and use a digital speedometer. I have to use a speedometer with km not mph, the authorities require this. Someone out there with a good idea ? Rune

Gents Many of you are using the Dakota Digital GPS module to feed the GM ECU a speed signal. Did You: 1. Connect to speed one or speed two? 2. Which pulse frequency did you select? Thanks